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Sharing GIS Technologies, Resources and News.

Global Soil Erodibility Dataset (2023 Edition)

We're sharing a valuable 2023 global soil erodibility dataset acquired through complex application procedures. This resource is particularly useful for GIS researchers conducting soil erosion studies.

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Global Income Tax Rates Dataset for GIS Mapping

While processing personal income tax returns, I compiled global income tax data into a GIS-compatible CSV format suitable for mapping in ArcGIS or QGIS.

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Converting GIS Polygons to WKT Format with QGIS and Python

While developing a workflow involving spatial data duplication, an analyst requested help with client requirements:
① Convert individual polygons to WKT format in TXT files
② Merge multiple polygons into MultiPolygon WKT format

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Calculating Polygon Centroids: Principles and Implementation

In a previous article "Adding Centroid Coordinates in QGIS Using Field Calculator", we demonstrated adding centroid coordinates via QGIS. This article explains the mathematical principles behind centroid calculation for polygons.

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Exporting SHP Feature Coordinates to TXT in QGIS: Practical Methods

When working with large SHP boundary files, exporting coordinates of specific district boundaries to TXT is straightforward in QGIS. Here are three approaches:

Method 1: GeoJSON Export

  1. Open SHP file and select target feature

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