What is a geoJSON file?
A geoJSON is a geospatial file format containing vector data, such as polygons (areas, borders), lines and points. It can contain multiple different geometries.
Are there any requirements for geoJSON files used in Maptionnaire?
The files should support GeoJSONs is WGS84 with the latitude and longitude units in decimal degrees.
How to upload a GeoJSON to Maptionnaire:
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In the survey, go to Page settings. Under Map overlays, click New and select GeoJSON.
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Click Upload and select the geoJSON from your computer.
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If you want to add place names to the map, choose the correct attribute column under Feature labels and turn on Show feature labels. If you have a lot of overlapping labels, consider turning on Declutter labels. It's also possible to change the visual appearance and placement of the labels.
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Set the color, size and opacity of the features (style is automatically transferred to Maptionnaire). For lines and polygons, the stroke can also be dashed.
You can also style the features by attribute e.g. assign different categories different colors as in this example with state parks:
- Click Save to finish.
Don't have a geoJSON but would like to create one? See these instructions on how to do this in Maptionnaire.
Before you upload or export map data, check the GIS data checklist: formats, coordinate systems and file sizes.