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I once found a great but simple webpage that has a drop-down with several text-based GIS formats such as GeoJSON and WKT, and a text box to copy/paste your data. The feature is then drawn on a world map. You can continue to add shapes on the same map.

Does anyone know the page, or any page where I can paste WKT and GeoJSON to see them displayed on a map?

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14 Answers 14

67

Look at Are there any online WKT editors?

GeoJSON and WKT

GeoJSON

WKT

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  • That first link for OpenLayers is the exact page I was looking for!! Thanks so much - I'm not sure why I couldn't find it.
    – JPhi
    Commented Oct 2, 2014 at 3:07
  • 1
    Love the OSM Playground!
    – Campa
    Commented Jan 7, 2019 at 14:51
  • Is it possible to specify the WKT as URL parameter, in order to share a shape with someone? Commented Feb 13, 2023 at 14:43
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I created this little utility for a co-worker to plot multiple WKT or GeoJSON geometries on a Leaflet map. You can fork it and tailor it to your needs.

http://jsfiddle.net/asnyder14/9dxbcr4f/embedded/result/

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  • 1
    Fantastic tool, thanks! (if'd be great it could accept more than WKT object at once... ;))
    – jjmontes
    Commented Oct 1, 2015 at 22:52
  • Exist a way for know when a point is inside Polygon
    – jose920405
    Commented Mar 10, 2017 at 14:41
  • 1
    @jjmontes Easy enough: jsfiddle.net/eyal0/z4px7g30/12
    – Eyal
    Commented Feb 4, 2021 at 17:14
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wkt:
https://arthur-e.github.io/Wicket/sandbox-gmaps3.html
https://clydedacruz.github.io/openstreetmap-wkt-playground/
https://geometrymapper.com

geojson:
http://geojsonlint.com/

csv:
https://www.becsv.com/csv-viewer.php

.shapefile/geojson/csv:
https://mapshaper.org/
https://www.sunearthtools.com/tools/gps-view.php

svgviewer:
https://www.w3schools.com/graphics/tryit.asp?filename=trysvg_path

svg handling:
https://github.com/substack/svg-linearize
https://github.com/davidmcclure/svg-to-wkt
https://www.w3.org/TR/SVG/paths.html
https://stackoverflow.com/questions/5736398/how-to-calculate-the-svg-path-for-an-arc-of-a-circle

geojson on leaflet:
Adding GeoJSON layer on leaflet?

converters:
CSV to GeoJSON: http://csv.togeojson.com/
CSV to GeoJSON: http://www.convertcsv.com/csv-to-geojson.htm
JSON to CSV: https://json-csv.com/
JSON to CSV: http://www.convertcsv.com/geojson-to-csv.htm
WKT to GeoJSON (printed in console): https://geometrymapper.com

examples:
wkt: https://en.wikipedia.org/wiki/Well-known_text#/media/File:SFA_Polygon.svg
csv: https://github.com/naturalatlas/geocsv-info/blob/master/example.csv
geojson: https://www.mapbox.com/mapbox-gl-js/example/geojson-polygon/
svg path: https://jsbin.com/quhujowota/1/edit?html,js,output
svg path: https://codepen.io/anon/pen/XogNoZ

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2

WKT visualizer on 3D Earth

https://asapelkin.github.io/wkt_3d_viewer

(repo with examples and readme https://github.com/asapelkin/wkt_3d_viewer)

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GeoJSON Viewer (from URL) gives a simple, quick map from a GeoJSON URL.

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In case anyone comes across this question and needs to convert to/from Esri (ArcGIS) json, geoJson, or WKT, I created a small application called geometry-inspector. It is much like the listed applications in the accepted answer, but with the improvement that it supports Esri's json format.

Hope it helps someone!

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Created a WKT <-> GeoJSON converter based on Wicket http://jhnotes.com/wkt/

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mapshaper worked well for huge GeoJson file but unfortunately it plots on white background instead of map.

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For bash, I use my own script: https://gist.github.com/rajanski/4d2595c1fd4e35c19b4e1a02b4ed579f Pro: Geojson data doesnt leave local machine, good for confidential stuff.

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Github/Gists can handle GeoJSON: https://help.github.com/en/articles/mapping-geojson-files-on-github

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For WKT there's also https://wktmap.com/ which supports different projections.

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Kepler.gl https://kepler.gl/demo

I can recommend the Kepler.gl demo where you can add your data in the following formats:

CSV, Json, GeoJSON or saved map Json.

As data privacy is a concern when using online viewers, they state:

*kepler.gl is a client-side application with no server backend. Data lives only on your machine/browser. No information or map data is sent to any server.

Screenshot: enter image description here

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WKT <-> GeoJSON converter and Map Viewer:
WKT & GeoJSON Map Viewer enter image description here

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geometrymapper is what you're looking for. This Online Mapping Tool is capable of plotting WKT and GeoJson in different coordinate systems and colors. Really recommend it. (mirror https://vannieuwenhovej.github.io/wkt-geometry-plotter)

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