Correction: Bachtiar et al. Spatial Variation in Transport-Related Particulate Matter Fractions Across Urban Districts in Padang, Indonesia: Evidence from Nano Sampler-Based Measurements. Earth 2026, 7, 50

The correction concerns Figure 1 of the published article [1]. In the original published version, the figure inserted as Figure 1 was incorrect and did not correspond to the Ambient Nano Sampler (ANS) setup used in the study. Therefore, the figure and its caption have been replaced with the correct version.

The corrected Figure 1 presents the Ambient Nano Sampler (ANS) used for size-segregated particulate matter sampling, including (Figure 1a) the field installation of the sampler, (Figure 1b) the schematic illustration of the multi-stage impactor separating particles into different aerodynamic diameter fractions, and (Figure 1c) the airflow control system connected to the vacuum pump. The schematic diagrams in the corrected figure are adapted from the ANS technical documentation provided by Kanazawa University.

This correction is necessary to ensure the accuracy and clarity of the methodological illustration. The correction is limited to the replacement of the incorrect figure with the correct ANS figure. The authors state that the scientific conclusions are unaffected. This correction was approved by the Academic Editor. The original publication has also been updated.