The TatukGIS Editor is a professional, general-purpose Windows GIS application for geospatial data creation, editing, mapping, and analysis and it is powered by Delphi. According to the developer, “This Editor provides the tools and functionality required by most GIS users, including multi-layer map projects, compatibility with most geospatial industry data formats and database engines, advanced rendering, 5,000+ coordinate systems with on-the-fly layer reprojection, 3D visualization, and GPS tracking. Advanced geospatial analyses and operations include data classification methods, layer statistics, contouring, slope analysis, viewshed and AGL visibility analysis, terrain profile, vector-to-grid interpolation algorithms, point cloud-to-grid conversion, operation pipelining, raster layer mathematics, advanced filters, topological operations, and geocoding. A powerful built-in (Pascal and Basic) scripting engine for creating plug-ins exposes a comprehensive API with hundreds of classes and thousands of documented methods and properties designed for custom GIS development. The TatukGIS Editor was released in 2005 and continuously updated/upgraded ever since. (The TatukGIS Editor is compiled from the TatukGIS Developer Kernel, a comprehensive GIS SDK also built in Delphi.)”
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This is a truly great tool for spatial analyses. Its cost is extraordinarily low compared to the industry leading vendor, its utility is comparable, and its user interface is far more pleasant to use than any of the free / opensource competitors I’ve tried. I’ve been happily using this for years.