Drawing/Viewing of GeoJSON layers

[rsbudd]

Hello Mr. Kemp:

Is it possible to to draw (interactively), save to GeoJSON format the resulting polygon, and also to recall/reload/draw the GeoJSON upon the map with your jk64-plugin-reportmap? I think I can utilize what is described for the Google API here with regards to layers; https://developers.google.com/maps/documentation/javascript/examples/layer-data-dragndrop so that it performs similar to what we can visualize here: http://geojson.io

The problem I'm trying to solve is to present a map to the end user, allow them to draw a geofence outline on the map (polygon, circles, square, etc.) and then save that in a standard GeoJSON format for later recall and post processing of vehicle gps breadcrumbs as they enter or exit the boundaries defined by the GeoJSON.

Thank you -- big fan of your work and your continued writing, I learn quite a bit from the discussions.

Budd

[jeffreykemp]

Great idea. Not sure when I'll have time to dig into it myself but I'll keep this on the radar. In the meantime if you want to give it a shot I encourage you to do so.

[jeffreykemp]

Features added:

• Add option to allow user to drag-and-drop GeoJSON fragments and files onto the map. The features are rendered on the map in the data layer.
• Event loadedGeoJson (for dynamic action).
• Add option to allow one or more shapes (marker, polygon, polyline, rectangle, and/or circle) to be added to the map by the user.
• Allow user to select a feature to move, edit, or delete it. Allow user to add extra polygons as "holes" in another polygon.
• Events: addFeature, removeFeature, setGeometry.
• Javascript API call to load GeoJSON string (e.g. from application code, or loaded from database).

Known Issues:

• The "circle" feature is not very useful. After drawing a circle, the feature is merely rendered as a single marker at the centrepoint, with a hidden "radius" attribute. No ability to view or edit the circle radius is given.

[jeffreykemp]

Added in Release 1.1