Study Area Plotter

Study area name

0ha

Place three or more boundary vertices to measure the area.

Perimeter0

Vertices0

Sampling points0

Zone31N

Centre of study area0

Sample areasNone

Show coordinates as UTM zone

Import a file Choose CSV, GeoJSON, KML or GPX

CSV rows need lat and lon columns. They are added as vertices in Boundary mode and as points otherwise. Polygons in GeoJSON, KML and GPX replace the boundary.

Add a sample area (for example an LGA)

The search runs inside the outline that is loaded, such as Ogun State. Tap a result to add it as a shaded area. Add as many as you need.

Sample areas 0

Boundary vertices 0

Sampling points 0

Geopolitical zones Show the six geopolitical zones on the map

Not downloaded yet. It takes about 40 seconds and is saved on this device.

Your own zone layer

Use this for senatorial districts, agro-ecological zones or any other zoning. Each region needs a name in the file.

Import GeoJSON or KML Layer title Field that holds the names Show this layer on the map

A shapefile must first be saved as GeoJSON in WGS 84, for example in QGIS. Boundaries are simplified on import so the app stays fast.

Map image with coordinates Map extent Include the coordinate table

Thesis-style location map (Nigeria with inset)

Not downloaded yet. It takes about 40 seconds and is saved on this device.

Figure title The inset shows Colour the national map by

On an iPhone, open this page in Safari, tap Share, then Add to Home Screen. On Android, use Install app in the Chrome menu if the button above does not appear.

GeoJSON and KML open directly in QGIS, ArcGIS and Google Earth. Keep the outline file beside your study area file to build a location map.

Every coordinate is WGS 84. Areas and distances use the WGS 84 ellipsoid with a local correction, which is suitable for planning and reporting. For legal or cadastral work, use a surveyed value. Field data recorded on the Minna datum must be converted before it is typed in or imported.

Plotted data is saved in this browser only. Map tiles and outlines need an internet connection.