GeoKolam: GIS & Field Maps

GeoKolam is a free GIS app for field work. Map land parcels, assets and surveys on your phone, measure areas in hectares, acres and cents, attach photos, and export to the formats your desktop GIS uses. No account, no ads and no tracking. Your data stays on your phone. MAP IN THE FIELD • Draw points, lines and polygons by tap, crosshair or GPS • Walk mode records a boundary as you walk • Snapping to vertices and edges, undo and redo • Rectangles, circles, freehand shapes and polygon holes • Split, merge, move, buffer and copy features • Type coordinates in decimal degrees, DMS or UTM, or enter bearing and distance • Live area, length and perimeter, measured on the ellipsoid RECORD WHAT YOU SEE • Forms with text, numbers, dates, yes or no, choice lists and links • Photos with GPS position and direction, video, audio and any file • Optional photo stamp with coordinates, time and project name • Attribute table with search, filter, sort and bulk edit PROJECTS LIKE DESKTOP GIS • Many maps and print layouts in one project • Single, category and graduated styles, labels and zoom ranges • Print layouts on A4 to A2 with legend, scale bar, north arrow and grid • Export layouts as PDF, PNG or JPG IMPORT AND EXPORT 15+ FORMATS • GeoPackage, Shapefile, KML and KMZ, GeoJSON, CSV, GPX, DXF • File Geodatabase (.gdb), Excel, GML, FlatGeobuf, MapInfo, PMTiles and more • Any coordinate system: WGS 84, UTM, Web Mercator or any EPSG code • Share a whole project as one package EXPLORE THE EARTH • 3D globe with terrain, satellite imagery and 3D buildings • Streets, satellite, hybrid, terrain and dark basemaps • Add drone images (PMTiles, MBTiles) and online XYZ, WMTS or WMS layers • Save basemap areas for offline use GPS AND GNSS • Satellites per constellation (GPS, GLONASS, Galileo, BeiDou, NavIC, QZSS), accuracy and DOP • GPS point averaging for more reliable points • Connect external Bluetooth GNSS receivers, including RTK Works in English and Tamil. GeoKolam is built by ArcGX TechLabs. Map data © OpenStreetMap contributors. Imagery: Copernicus Sentinel-2 and NASA. Powered by ArcGX.