Maps & Geometry Viewer
Visualize GeoJSON, WKT, and GPS coordinates with satellite basemaps and real-time area calculations
Map Layer
Boundary Styling
Paste a GeoJSON/WKT polygon, load a preset, or click "Draw Boundary" on the map toolbar to view real-time area and perimeter calculations.
How Maps & Geometry Viewer Works
The Maps & Geometry Viewer is an interactive spatial tool designed for Cambodia. It allows you to plot GPS coordinates, inspect boundary lines, and visualize spatial geometries directly on high-resolution Google Satellite, Hybrid, and OpenStreetMap basemaps. All surface areas and perimeters are automatically measured in real time.
1 Quick Start Guide
Select your format in the Data tab (GeoJSON, WKT, or CSV), paste your spatial text, or test with one-click presets like Angkor Wat or Royal Palace. Click Render on Map to fly directly to the geometry.
Click Go to Lat/Lng on the map toolbar or status bar. Paste coordinates like 11.5564, 104.9282, Google Maps links, or DMS formats. Select a zoom level to fly smoothly and place an animated target pin.
Click Draw Boundary to trace any shape vertex-by-vertex on satellite imagery. Click Finish (or press Enter) to generate the GeoJSON and calculate enclosed land metrics instantly.
Open the Metrics tab to see surface area in square metres, ares (អា), and hectares (ហិកតា). Click Export .geojson to download GIS-ready files for QGIS, ArcGIS, or Google Earth.
2 Supported Spatial Formats
Industry standard for web mapping. Supports FeatureCollection and Feature objects containing Polygons, Points, and LineStrings with custom properties.
Text-based geometry representation used by PostGIS, QGIS, and spatial databases (e.g. POLYGON ((lng lat, ...)) or POINT (lng lat)).
Tabular coordinates with header rows. Automatically detects latitude, longitude, and name columns for bulk point visualization.
3 Cambodian Land & Area Units
All polygon areas are calculated using geodesic spherical trigonometry (WGS 84 ellipsoid), accounting for the Earth's curvature. Calculated square metres are automatically converted into standard Cambodian measurement units:
| Unit Name | Khmer Term | Metric Equivalent |
|---|---|---|
| Square Metre (m²) | ម៉ែត្រការ៉េ | 1 m² |
| Are / Kong | អា / កុង | 100 m² |
| Hectare (ha) | ហិកតា | 10,000 m² (100 ares) |
| Square Kilometre (km²) | គីឡូម៉ែត្រការ៉េ | 1,000,000 m² (100 ha) |
4 Best Practices & Tips
GeoJSON and WKT specifications expect [Longitude, Latitude] (X then Y), while GPS displays typically write Latitude first. The viewer automatically detects and formats coordinates accordingly.
When drawing boundaries manually, switch to Hybrid or Satellite view and zoom in to Level 17–18 for accurate placement along tree lines, fences, and roads.
While drawing, press Enter to finish and close the polygon, or Escape to cancel drawing.
Move your cursor anywhere over the map canvas and click the bottom-left coordinate pill to copy the exact latitude and longitude to your clipboard.