About GeoTee — Goperamanan Thirusenthivel

Goperamanan Thirusenthivel

கோபிரமணன் திருசெந்திவேல்

MSc · GIS and information-systems consultant · founder of GT Digital, Batticaloa, Sri Lanka. GeoTee grew out of a decade of building maps and dashboards for public-health and humanitarian programmes (WHO Somalia and the Greater Horn of Africa drought response, WHO Bangladesh microplanning) with tools that were either expensive, closed or too heavy for field offices. GeoTee is the answer: one PHP + PostGIS-free server, GDAL and Python underneath, nothing to install on the user's machine, and every method documented in plain language and in Tamil.

gtdigital.tech · geotee.gtdigital.tech · goperamanan@gmail.com

Training materials

Everything in GeoTee is taught somewhere. Start with the guide, keep the Tool Reference open while you work.

Training guide (English)12 modules from sign-in to time series and flow maps, with a completion checklist

பயிற்சி வழிகாட்டி (தமிழ்)The same guide in Tamil

Tool Reference398 toolsOne page per analysis tool: what it does, parameters, output, a worked example and related tools

Plugin developer guideWrite your own tools in JavaScript or sandboxed Python — manifest, contracts, examples

Example app — Somalia IDP movement 2016–2023A published flow-map app built from the UNHCR PRMN dataset; the same project is available as a .geotee.zip package

Inside the appProject tab › Training Guide · Command Search (Ctrl+K) finds any tool · every dialog has a “?” link to its reference page

What GeoTee is

Desktop-class analysis in the browser — 220 built-in tools across geometry, overlay, spatial statistics, network, hydrology, surface, raster and remote sensing, plus 21 plugins; the Spatial Analysis Catalog of ArcGIS Pro / QGIS was used as the checklist.
Data in, data out — Shapefile, GeoPackage, GeoJSON, KML, CSV/XLSX, GeoTIFF, PMTiles, ArcGIS REST, WMS/WMTS, PostGIS connectors; exports to every common format and print layouts.
Apps and forms — an app builder (widgets, pages, time bar, swipe, charts), public or password-protected sharing, and field-data collection forms.
Time and movement — weekly / monthly workbooks become playable change maps; origin-destination tables become flow maps.
Yours — self-hosted on one VPS, role-based users, no telemetry, no licence servers. Built copyright-clean: the ideas of the Pro pattern, none of its code or artwork.

Credits and data attribution

Built on GDAL/OGR, SpatiaLite, MapLibre GL, WhiteboxTools, OSRM, NumPy / SciPy / scikit-learn / scikit-image, PMTiles and PHP. Basemap data © OpenFreeMap, OpenMapTiles, OpenStreetMap contributors · Boundaries © geoBoundaries (CC BY 4.0) · Sentinel-2 cloudless by EOX (CC BY 4.0) · Humanitarian icons © OCHA (CC BY) · Example displacement data © UNHCR PRMN.