Article Land Use and Natural Resources Planning for Sustainable

The primary objective of this study is to evaluate the land use and natural resources for future sustainable ecotourism site planning using GIS as a tool. The study is based on 2007 land use land cover data and ecotourism suitability data which are then integrated with other GIS datasets to evaluate the land use and natural resources at a district level in Surat Thani province. The final step of this study was the prioritization of the area that is best suited for ecotourism in assessing ecotourism sustainability in Surat Thani province. The result is useful for tourism facilities development and ecotourism resource utilization where ecotourism could be more developed. Additionally, the results can be used for managers and planners working in local and central governments and other non-governmental organizations. These integrated approaches cover complex and universal issues such as sustainable development of ecotourism, biodiversity conservation and protected area management in a tropical and developing country such as Thailand. Moreover, it is believed that this study can be used as a basis for evaluating the suitability of other areas for ecotourism. In addition, it may also serve as a starting point for more complex studies in the future.


Introduction
Tourism is a highly complex activity and thus requires tools to assist in effective decision making to come to terms with the competing economic, social, and environmental demands of sustainable development [1].Similarly, tourism activities generally can create various negative impacts on the surrounding environment.Increased human interference in ecologically fragile areas can cause irreversible change in the existing ecological processes.These problems can be reflected in degrading natural resources, vegetation structure and the size of the habitat patch, increasing deforestation and decreasing upstream water flows.Ecotourism encompasses a spectrum of nature-based activities that foster visitor appreciation and understanding of natural and cultural heritage and are managed to be ecologically, economically and socially sustainable [2].Therefore, ecotourism is accepted as an alternative type of sustainable development [3].Ecotourism has attracted increasing attention in recent years, not only as an alternative to mass tourism, but also as a means to promote a country's economic development and environmental conservation [4].For example, in Costa Rica, Ecuador, Nepal, Kenya, Madagascar and Antarctica, ecotourism represents a significant portion of the gross domestic product and economic activity [5,6].This necessitates a methodical management of ecotourism destinations, which can minimize the impacts from ecotourism activities while offering benefits to local communities.Ecotourism is based on the natural environment with a focus on natural and cultural heritage.Hence, establishing a set of warning indicators and criteria is necessary for ecotourism management [7].Abidin (1995) identified a set of 15 criteria and 58 indicators for evaluating sustainable ecotourism development in Taman Negara National Park (TNNP), Malaysia, on the basis of Delphi method [8].Boyd et al. (1994) and Boyd and Butler (1996) used a resource inventory to identify potential ecotourism sites in Northern Ontario in Canada.GIS techniques were used to measure the ranking of different sites according to the set criteria (naturalness, wildlife, cultural heritage, landscape and community) for ecotourism [9,10].Bukenya (2000) employed six criteria-a high number of species, wildlife management potential, endangered species, potential to attract more tourists, less susceptibility to encroachment and degradation over long period-to prioritize the potential national parks in Uganda [11].In Samoa, 20 critical sustainable indicators were developed by field testing and screening to assess the overall sustainability [12].There is no doubt that ecotourism represents more friendly alternatives for economic use of natural resources, when compared to other consumptive economic uses, such as mining, logging, farming, and others [7].Furthermore, Kumari (2010) integrated five indicator indices to identify and prioritize the potential ecotourism sites in West District of Sikkim state in India by using analytical hierarchical process (AHP) and GIS.The primary variables used for generating various indices were landform, elevation, land use/cover, vegetation diversity, density and endemism, wildlife, tourism attraction features and the infrastructure facilities [13].Godratollah et al. (2011) identified 61 indicators on environmental (ecological), social, economic, cultural and institutional aspects affecting sustainability of ecotourism.The study shows that it is possible to define a set of indicators for monitoring ecotourism sustainability in Northern forest of Iran [3].Use of ecotourism indicators will help to identify the potential ecotourism sites based on the physical environmental and socio-economic parameters [13].
Land use management practices have a major impact on natural resources including water, soil, fertility, plants and animals [14,15].In Thailand, being a tropical country, one of the prominent characteristics of land use/cover change (LUCC) is the decline in forest and woodlands due to land conversion, and particularly agricultural expansion for cash crop production such as cassava, corn, rice, and sugarcane [16][17][18].In order to determine the most desirable direction for future development, the suitability for various land uses should be carefully studied with the aim of directing growth of the land use to the most appropriate sites.Land suitability evaluation is the process of determining the fitness of a given tract of land for proper use [19].Careful planning of the use of land resources is based on land evaluation, which is the process of assessing the suitability of land for alternative land uses [20].Land use is characterized by combination of land cover and human activities which can change over time.In the definition of land use, a direct link is established between land cover and the actions of human beings in their environment [21].The process of land resource plans and decision making aims to identify the most appropriate spatial pattern for future land uses [22].Therefore, the monitoring of LUCC provides significant input information for effective natural resources rehabilitation, protection and conservation planning.
Among the most fundamental issues that need careful consideration when pursuing such a research endeavor, are the quality of the data and the adoption of appropriate techniques.Likewise, GIS has also been very helpful in facilitating LUCC studies [23].These capabilities make them a promising tool, especially for land use planning and LUCC modeling [24,25].Additionally, GIS technology can be used for suitability evaluation and management of land resources [26].Site selection is also an important use of GIS in tourism planning.For instance, by using suitable location identification tools and topology it is possible to identify potential areas for further tourism development [27].The land suitability classifications will be determined by overlaying thematic maps and by analyzing attribute data with the support of GIS [28].Minagawa and Tanaka (1998) used GIS to locate areas suitable for tourism development at Lombok Island in Indonesia.Using map overlay and multi-criteria evaluation a number of potential sites for tourism development were identified [29].GIS can play a critical role in auditing environmental conditions, examining the suitability of locations for proposed development sites, identifying conflicting interests and modeling relationships [30].
This study investigated Surat Thani to prepare ecotourism planning for sustainable development involving GIS as a tool for evaluating and monitoring the natural resources, especially potential ecotourism sites.GIS is a tool to acquire, explore and analyze the geospatially distributed objects and their associated attribute information that can improve decision making.Nowadays, GIS is an integral part of spatial planning to identify the suitability of sites based on existing land resources which can be integrated with non-spatial information (i.e., socio-economic, government policy, etc.) by decision makers [31].Therefore, the study aims to evaluate and monitor the natural resources used for ecotourism site selection on the land ecosystem of Surat Thani province using GIS.The methodology is to generate land use/cover (LUC) map for ecotourism and present a suitable area for ecotourism development at a district level.Likewise, the land ecosystem resources and aesthetics are related to terrestrial ecotourism, i.e., ecosystems located inland, excluding marine ecosystem.These land ecosystem resources cover landscape, flora, fauna, culture and the way of life of local people while its activities consist of such as, trekking, biking, bird watching, cultural study, natural study, etc. [32].Surat Thani was selected as the research area.It plays an important role for ecotourism; the physical attributes and scale of Surat Thani landscape make the area a prime candidate for ecotourism.This area contains rich biodiversity, wildlife, trekking, scenic, and other attractions.Socio-economic activities impose increasing pressure on land resources, thereby creating competition and conflicts in their uses.Therefore, it is important to maintain a careful balance between preservation and the promotion of sustainable development in order to ensure the long-term health of both the ecosystems and the tourism economies in this province.Since, the lack of tourism planning and management currently inhibit Surat Thani province from fulfilling its tourism potential.Many destination areas are being developed on the basis of supply push, rather than the existing market demand.This may cause duplication, competition and oversupply among those attractions.There is a lot of package holidays and mass tourism.Due to the rapid growth of mass tourism, some activities can degrade natural resources, especially when confronted with poor management [33].Hence, it is necessary to identify the area suitable for ecotourism in order to help in the decision making of the concerned authorities and help to maintain the environment of these attractions.Likewise, a challenge for a decision maker is how to manage ecotourism in order to minimize the negative impacts.Therefore, ecotourism planning is needed for sustainable tourism development in Surat Thani by guiding regional land use decisions that provide the greatest benefits in terms of conservation of biodiversity and other ecosystem services.

Study Area
The study area is focused on the land ecosystem of Surat Thani province in the south of Thailand which covers an area of 1,250,957.61ha and consists of 17 districts (Figure 1).This area is situated along the coastline of Surat Thani province, which has a length of around 156 km together with various islands.There are ferries providing transportation from main land to the islands at Don Sak district.The province of Surat Thani also occupies the largest area on the coast of the Gulf of Thailand.The topography of this area is a combination of mountain ranges, valleys and river plains.The northern and southern parts are mostly mountainous.The local climate is influenced by the northeast monsoon towards the Gulf of Thailand and the southeast monsoon from the Indian Ocean.This study area appears to have many potential attributes that can be explored and utilized for successful ecotourism development.For example, it is a rich in nature, history and culture which make it a favorite destination for various international tourists.Besides, there have been a number of provincial parks which further the recreational-tourist presence and help to safeguard some of the natural features.
This province is one of the most popular and important tourism areas of Thailand.The types of tourism include natural tours, cultural tours, excursions and recreational activities.Most tourist attractions are popular among Thais and foreigners with a gradually increasing number.The Tourism Authority of Thailand (TAT) estimates that the number of tourists has increased dramatically since 2003 from 1.64 million and up to 2.58 million tourists in 2007.Whereas, the rapid increase of visitors in this province can be considered a warning signal for tourism development in this region.In recent years, policy makers have begun to advocate sustainable destination planning for tourism in Thailand with a set of management approaches but an information systems to assist decision making is less apparent.Besides, most of the management approaches are focused on meeting the demands of the tourists rather than the needs of the ecotourism resources.It must be recognized that at present resource managers at site level still lack a fundamental understanding of ecotourism management and an ability to develop the resources' ecotourism potential in assessing sustainable development of ecotourism.Therefore, planning is essential for future development to conserve the natural environment of the ecotourism destinations in a sustainable manner.

Data Acquisition and Pre-processing
The primary input data of the 2007 LUC and topographic map are derived from the Department of Land Development, Thailand at the scale of 1:50,000.The thematic maps are created and edited, overlaid and visualized on ArcGIS 9.3.There are 5 main classified LUC classes in Surat Thani province.These are urban and built-up land (U), agricultural land (A), forest (F), water body (W) and miscellaneous land (M).This study considered some important issues related to ecotourism potential resources.There were 10 LUC classes determined in this study.The definition and characteristics of each LUC class is described as follows: (1) Crop land (AC) includes paddy fields, field crops, truck crops and horticulture.
(2) Farm land (AF) includes pasture and farm houses, poultry farm houses and aqua cultural land.
(3) Orchard (AO) is an agricultural land which consists of mixed orchard and orchard (orange, durian, rambutan, coconut, and cashew).( 4) Plantation (AP) is an agricultural land which consists of mixed perennials and perennials (oil palm, para-rubber, eucalyptus, teak, magosa, casuarinas, and coffee).( 5) Dense forest (F) consists of the main natural forest including evergreen forest, swamp forest and mangrove forest.
(6) Open forest (FO) is forest lands in which further the recreational lands are included in mixed forest plantations, forest plantations and agro-forestry that are caused by human activity, such as conversion of forest areas, vegetated areas for new cultivation.(7) Degraded forest (FD) includes disturbed evergreen forest, disturbed swamp forest, disturbed mangrove forest and disturbed forest plantations.(8) Miscellaneous land (M) includes rangelands (grass, scrub, and bamboo), marsh and swamp, mines and pits (laterite pits, sand pits, and soil pits) and other.( 9) Urban and built-up land (U) is composed of cities, towns and commercial, residential houses, villages, institution land, industrial land, transportation, communications, utilities and so forth.(10) Water body (W) includes both natural water bodies (rivers, canals, and lakes) and man-made (reservoirs, dams, farm ponds, and irrigation canals).

Classified LUC Map
This part is to generate LUC map 2007 for ecotourism development focuses in land ecosystems of Surat Thani province.The various LUC types were identified according to the bio-physical vegetation characteristics for ecotourism potential resources and the background knowledge of the study area.Therefore, the LUC 2007 was reclassified into 10 LUC classes presented in Figure 2. The result of the area coverage of each LUC class in hectares shows in Table 1.It could be seen that, from the total area of 1,250,957.61ha of the province being classified, about 60.12% was used for various agricultural uses, such as oil palm, para-rubber, orchard and other crops/farm land, while 31.27% was classified as forest area.Less than 3% was classified as urban and built-up area.

Classification of Suitable Areas for Ecotourism
This study has been built upon the land suitability map for ecotourism to classify suitability by each LUC type at district level [34].This study demonstrates a methodology for identifying potential ecotourism sites using GIS and AHP as case study of Surat Thani province, Thailand.The main steps to produce land suitability map for ecotourism are: finding suitable factors to be used in the analysis, assigning factor priority, weight and class weight (rating) to the parameters involved and generating land suitability map of ecotourism.In this process, experts' opinions were asked to calculate the relative importance factors involved.The AHP is one of the most extended Multi-Criteria Decision Making (MCDM) techniques.This method provides a structural basis for qualifying the comparison of decision elements and criteria in a pair wise technique.The decision criteria and factors were divided into two main categories according to the land ecosystems of Surat Thani: physical environmental and socio-economic parameters.This study selected five criteria and nine factors in the form of nine GIS-based layers in determining what areas are best suited for ecotourism development.These are landscape/naturalness (visibility, land use/cover), wildlife (reservation/protection, species diversity), topography (elevation, slope), accessibility (proximity to cultural sites, distance from roads) and community characteristics (settlement size).These criteria and factors were chosen based on the opinion experience and expertise of experts, surveying of authenticated literatures and analysis of historical data.The flow chart of the suitability analysis methodology is shown in Figure 3.
First, the AHP method was applied to determine the relative importance of all selected criteria and factors.Each criterion and factor received a weight and a score which represented its relative importance in the suitability evaluation.The total score for suitability is achieved by multiplying criterion score with its appropriate weight and adding all weighted scores.At the next stage, spatial data of the 9 factors as a set of GIS layers were overlaid together for final suitability classification for ecotourism.Further analysis was done in raster-based format and was then reclassified into 4 classes using the 'reclassify' function.Finally, the suitability map for ecotourism was produced using GIS overlay.At the end of this process, the suitability map for ecotourism development is generated.The degree of suitability of each factor classified as highly suitable (S1), moderately suitable (S2), marginally suitable (S3) and not suitable (N) is displayed in Figure 4.  Result of the area coverage in the classified suitability map for ecotourism is shown in Table 2.The map contains pixels with varying degrees of suitability from 0 to 1.A higher pixel score shows a higher suitability level.The map was reclassified, for easier representation, into four classes based on the structure of the FAO suitability classification [35]: the highly suitable (0.75-1.00), the moderately suitable (0.50-0.75), the marginally suitable (0.25-0.50), and the least suitable (0-0.25).The highly suitable is the suitable capacity of locations with high and satisfies all criteria set up.The moderately suitable is the suitable capacity of locations with medium and satisfies most of the criteria set up, but some criteria are not satisfied.The marginally suitable is the suitable capacity of locations with low and satisfies some of the criteria set up, but most of the criteria are not satisfied.The not suitable assumes that all of criteria are not satisfied.The extent of each class is summarized in Table 2.The result indicates that 0.4% (4,995.43ha) of the total study area was found to be the highly suitable class.These areas are mainly located in the sensitive areas that characterized with very rich biological diversity, endemic and endangered species.However, these areas can be considered as the most ecotourism attractions but under the controllable and limitations of visitor, in order to protect and preserve the most of the biodiversity value and their environmental condition.If people are attracted to the most valuable areas too much, this could again harm the quality of the areas.In addition, the moderately suitable class was found to be 28.9% (361,525.77ha) of the territory that can be considered as moderately attractive for ecotourism.These areas are mainly characterized as very attractive and have recreational potential for ecotourism, such as beautiful scenery, spectacular landscapes, wildlife, abundant and different plant communities.Both of the highly and moderately suitable classes were 29.3% (366,520.20ha) of the total area.This result highlights that the highly and the moderately suitable areas have been found in the protected areas (as seen in Figure 4) that are suitable for ecotourism requirement.Reasonably, the number of eco-destinations expands with the increases in park numbers [36].The moderately suitable class was found to be 69.83%(873,507.55ha) of the area with low sensitivity.These areas can provide eco-tourist facilities by facilitating proper ecotourism infrastructures and services under the policy guidelines.For example [34], the areas could accommodate physical structure to support ecotourism activities, such as green hotels, eco-lodge, restaurants and public convenience facilities.Specifically, infrastructure should be developed in harmony with local identity and with nature.Ecotourism infrastructure development and maintenance should be reflected best practice minimal impact design and procedures appropriate to the setting.Provide safe, reliable, sustainable and appropriate access to ecotourism attractions in and nearby natural areas.While, only a few percentage of the area is about 0.87% (10,928.86 ha) which was classified as not suitable for ecotourism refers to the areas with several effects of development from human activity and degraded forest.There is decreasing of forest because of deforestation for agriculture areas, the cultivation of steep slopes, trespassing upon public area to be dwelling of local people and illegal wood processing.Such areas are in a deteriorated condition or have been destroyed.

Comparison between LUC Map and Suitability Map
The spatial matching offered valuable information to identify whether the land was optimally utilized in the region [37].The result of overlaying the suitability map (Figure 4) with the LUC map of 2007 (Figure 2) is presented in Table 3.This table displays the suitability of each LUC type in the study area.The LUC map indicates that the four major land uses are plantation (655,634.10ha), dense forest (381,372.70ha), miscellaneous land (45,822.42ha) and orchard (43,688.62 ha), which account for 53.21%, 30.49%, 3.66% and 3.49%, respectively, of the total study area.Dense forest (F) that is mainly dry evergreen forest and mixed deciduous forest is mainly located in the protected areas.Considering plantation is mainly characterized by para-rubber and oil palm that is the most important cash crop in Southern Thailand.Miscellaneous land includes rangelands, marsh and swamp.The orchard consists of mixed orchard (such as rambutan, durian, mangosteen, orange, etc,) and coconut.
As expected, the highly suitable and moderately suitable areas for ecotourism were found in the dense forest but these utilized lands should be controlled under the use of certain limitations and guidelines.If too many people claim the most valuable areas, this could again harm the quality of the areas.The result indicates that 95.73% of the highly suitable class was distributed over the dense forest, while only 4.06% of this classification was located in the plantations.With respect to the moderately suitable class, 91.70% was also found in the dense forest, whereas only 5.52% of the class was located in the plantation.However for the marginally suitable area, 73.68% was found in the plantations.This is because plantation areas should be properly monitored and protected from any encroachment.In addition, the unsuitable class was distributed over the miscellaneous land (47.46%).This class was also found in the plantations (17.53%) and the urban and built-up land (14.14%) that is generally suitable for eco-tourist infrastructure development.

Classification of Suitable Areas for Ecotourism at District Level
The zonal analysis method was used to determine the average suitability for each district.This method is the creation of an output raster (or statistics table) in which the desired function is computed on the cell values from the input value raster that intersect or fall within each zone of a specified input zone dataset.The ecotourism land suitability analysis at district level was also assessed and the results are shown in Table 4. Note: District locations are shown in Figure 1.
The result indicates that the highly suitable areas (S1) are mostly located in the districts of Khiriratnikom (30.94%) and Ban Nasan (16.13%).These districts are characteristically endowed with lush green forests, wildlife sanctuaries and a rich cultural heritage and they are mainly located in protected areas.Therefore, the management of these areas is comprehensive and addresses issues of resource conservation, environmental management, and the control of tourism development.For instance, these areas can be used for education as well as conservation of biodiversity and maintenance of the ecosystem.Then, the moderately suitable areas (S2) are mainly located in the districts of Ban Takhun (34.25%) and Phanom (19.25%).Most of these are largely free from urban settlements, with a unique and outstanding natural beauty, diverse attractions and great tourism potential.Most of them are located in the protected areas, where they are attractive and have recreational potential for ecotourism.Subsequently, the three areas with the highest percentages of marginally suitable land (S3) are located in Punpin (10.75%),Karnjanadit (9.54%) and Tha Chang (8.79%) districts.The most appropriate areas are mainly located in urban area.The areas are appropriate for facilities development because there are no conflicts or any restrictions on usage areas.These areas can provide ecotourism services which take into account the condition of the natural environment, local society and culture.Finally, the percentages of unsuitable areas (N) for ecotourism are often located in urban areas of Punpin district (26.55%) and Chiya district (13.30%).
More specifically, ecotourism development needs to consider additional environmental problems which can be controlled using sustainable ecotourism site planning where the areas are suitable for ecotourism.This classification of suitable areas for ecotourism at district level also encouraged the development of a database and inventory of natural areas with ecotourism potential to minimize fragmentation and duplication in planning.

Results and Discussion
This study is at the preliminary stage of assessing whether land is likely to be practical and successful for future sustainable ecotourism sites.The study was conducted from the perspective of natural resource management and future sustainable ecotourism development using GIS.The GIS data offered LUC information that was crucial to examining the spatial matching between the potential suitability areas and the current LUC patterns.This information helped to identify priority areas for ecotourism and whether future land uses can be modified for future development within the province.This study further classified suitable areas for ecotourism at district level of Surat Thani where ecotourism sites should be promoted.The application of this paper can be useful for the managers and planners working in local and central governments and other non-governmental organizations.Since tourism in Surat Thani is largely dependent on a major use of natural resources and biodiversity, it is recommended that tourism be specifically addressed by regional policies that deal with biodiversity and conservation.More specifically to this study, it should be noted that the land suitability map for ecotourism is intended to guide regional land use decisions.It can be used for a decision making process that allocates land to the uses that provide the greatest benefits in terms of conservation of biodiversity and other ecosystem services in this province.Therefore, an ecotourism development plan should be incorporated into the development plans at district, provincial and regional levels to link resources which can complement each other.This will make it easier to redirect tourists away from tourism resources whose capacity is already exceeded.
In addition, this study result appears practically useful for the development of tourism facilities and ecotourism resource utilization: First, for the highly suitable areas (4,995.43ha), most of which are located in the protected areas (Figure 4) characterized by dense forest and need to be conserved.Its high value of natural resources is suitable for research and education because some are involved in the sensitive areas.To maintain ecotourism, development must control and manage the resources in order to retain their original conditions as far as possible, and to avoid or to abstain from travelling in sensitive areas [38].Thus, this area can still be considered for ecotourism attraction, but with the use of certain limitations and guidelines.Hence, the example of guidelines to be used to limit the number of tourists and duration of access to the areas is the necessary code of conduct.Activities suggested for these areas include those for purposes of research and education [39].With regards to preserving most of the biodiversity value, ecosystem protection is the first issue for ecotourism development in environmentally sensitive areas.Moreover, effective and responsible marketing of ecotourism opportunities can be used as a form of visitor management, creating realistic expectations and an understanding of allowable and acceptable behavior while visiting sensitive natural areas.However, reducing the amount of visitor pressure on these sites is recommended.
Secondly, the moderately suitable class was found to consist of 361,525.77ha of the total area that could serve as major attractions for ecotourism.Most of them are located in the protected areas.The majority of the marginally suitable land (873,507.55ha of the total area) can be considered for ecotourism by incorporating appropriate infrastructures and services under the policy guidelines.Finally, about 10,928.86ha of the total area was classified as unsuitable for ecotourism because some are degraded forest areas and destroyed public areas that would cause severe environmental degradation from an effective use of land for human requirements.Thus, it should be strictly restricted from tourism and any activities.It is very important that more people, especially Surat Thani visitors, are educated in the concept of sustainable development and the principles of sustainable living [40].Therefore, issues of ecosystem management and conservation of biodiversity should be addressed with local communities and stakeholders in protecting ecosystem and biodiversity [41][42][43].These will increase opportunities for local people and communities to participate in ecotourism and will help in distributing the income.More importantly, apart from local communities, the government and international agencies play a very important role for promotion as well as demotion of any initiative.Civil societies need to be more responsible for sustainable ecotourism to safeguard public lands, protected forests, water bodies, and violation of local and indigenous customary rights [44].This consideration is a very important aspect for high-quality tourism in this province.
However, the GIS tool is only a preliminary way to assess appropriate land areas which may be suitable for ecotourism.This study is just a beginning, its regular monitoring and needs-based implementation of activities is crucial for this work.Carrying capacity should be dealt with higher up where the marketing element is discussed.Local communities can play a crucial role in planning, organizing community and stakeholder engagement, finding other forms of land use and environmental impact assessments, as well as performing social impact assessments.Provincial and federal governments also should recognize the contribution of the local people.Likewise, ecotourism management must take the character and potential of existing resources from the suitability map for ecotourism in order to arrange appropriate activities and to ensure compatibility between ecotourism and the original activities carried out in the area.This should include the avoidance of any serious conflict, especially in areas that are highly suitable for ecotourism, with other forms of tourism.For example, zoning, i.e., establishing a tourism zone, a conservation zone, a buffer zone, and a rehabilitation zone, which should be done not only in protected areas but also in areas which are currently not suitable for ecotourism, the land having severe limitations that preclude the given type of use, but can be improved by specific management.We believe that if such tourism strategies are introduced according to these zones, they can prevent further deforestation and improve the appropriate use of land in the buffer zone.In addition, ecotourism marketing will have to wait until the resources are more ready, but in the meantime existing tourism activities in potential ecotourism areas are in need of proper control and guidelines if they are not to be subject to environmental deterioration and destructive competition in order to attract ever greater numbers of visitors which would have a greater impact on the goal of promoting sustainability.This is a good form of alternative tourism but numbers and land use should be carefully monitored.Therefore, the ecotourism market is expected to grow somewhat slowly until many of the issues mentioned here are addressed.
Additionally, ecotourism development must promote educational development and create awareness in people of the need to jointly maintain the ecosystem of the area.There is a need to implement development plans and manage natural resources in a way that ensures ecological and environmental integrity.Environmental education and interpretation is the key to creating an enjoyable and meaningful ecotourism experience, and is one of the key points of differentiation between ecotourism and other tourism products.Successful interpretive components of ecotourism products will foster appreciation and support for conservation efforts, local communities and culture [2].Moreover, a further study should be done implementing other sub-related models such as the carrying capacity model in establishing a comprehensive ecotourism resource management plan.Furthermore, this can be done by allowing local people, communities and organizations to participate in environmental and resource management [45] and by creating legal and economic measures to control environmental and resource use, including setting up a management system that can foster economic development and improvements in people's quality of life.In addition, villagers should be empowered to manage natural resources within the boundary of their own villages.This study recommended that local people should be involved in the planning process under participatory approaches, i.e., when decision makers prepare a plan, they must consider local people's opinions and their interest [27].
Furthermore, this study might be useful to those who are interested in the GIS technique for assessment and monitoring of natural resources, especially ecotourism sites and mapping.GIS plays a key role in documenting natural conditions, developments and documenting the suitability of resources for tourism, exposing conflicts, and revealing cause-effect relationships [46,47].As previously mentioned, the use of GIS is not only ideal for reducing the time and cost of site selection, but also provides a digital data bank for long-term and beneficial monitoring of sites [48].The study shows that GIS can evaluate dynamic patterns of LUCC as well as providing a preliminary study for identifying priority areas for ecotourism and thus, it contributes to improving the efficiency of conservation and of sustainable land management in the Surat Thani province.This approach can be used as a basis for evaluating the suitability of other areas for ecotourism and it may also serve as a starting point for more complex studies in the future taking into consideration those limitations encountered in this study.
Finally, land use decisions are based not only on such information but also on other assessments, such as economic analysis of land uses and environmental impact assessments.Since only a small number of socio-economic factors have been considered for the evaluation of land suitability, it is recommended to incorporate more factors to represent a holistic view of the actual process, such as distance from local community or from protected areas.Moreover, research can be extended to explore the application of other information sources such as remote sensing images, Global Positioning System (GPS), etc. which should be encouraged as it will help bring real changes to land use and management strategies.

Figure 1 .
Figure 1.Location of the study area.

Figure 3 .
Figure 3. Flow chart of the suitability analysis.

Table 1 .
Area coverage of land use/cover change (LUCC) classes in 2007.

Table 2 .
Area coverage for ecotourism suitability classes.

Table 3 .
Classification of suitability by each LUC type.

Table 4 .
Classification of suitable areas for ecotourism at district level.