gavinr / geojson-viewer

View GeoJSON from a URL (with permalinks)

GeoJSON Viewer

View GeoJSON based on a URL param

Usage

Pass a GeoJSON url to the parameter in the form https://gavinr.github.io/geojson-viewer/?url=________

Examples:

• Demo 1 - US National Parks
• Demo 2 - Washington DC Bike Lanes
• Demo 3 - Allegheny County Blazed Trails Locations

Advanced Usage

Some additional URL parameters you can use:

• color=<color> - set the layer color. Example
• swipeLayer=<url> - second layer to show as a swipe. Example
• swipeLayerColor=<color> - set the swipe layer color. Example

Technologies

• ArcGIS API for JavaScript - GeoJSONLayer

geojson-viewer's Issues

Upgrade to jsapi 4.x

https://developers.arcgis.com/javascript/latest/sample-code/layers-geojson/index.html

Deal with non-CORS URLs

If the url is not sending a CORS: * header, then we cannot map it. Maybe think about using a public proxy for these urls or some other solution.

At least give an error explaining the situation.

Zoom extent - sometimes does not buffer enough

I've recently enabled the tool as a layer preview for dataset pages that the Open Water Foundation publishes. Thanks for providing this tool because other tools require interactive submission of the layer, which does not work for integration. Below is an example page:

https://data.openwaterfoundation.org/country/us/usgs/huc-basins/

I've noticed that some layers when viewed do not result in a sufficient buffer around the layer's features, for example:

https://gavinr.github.io/geojson-viewer/?url=https://data.openwaterfoundation.org/country/us/usgs/huc-basins/huc4-basin-1020-platte.geojson

This requires the user to zoom to see the whole layer. The behavior seems sporadic, as if the zoom level is remembered between different uses?

Also, it would be great if the viewer allowed changing the background layer. We often use the USGS topo map.

Thanks again for publishing this tool. It has allowed us to move forward with other development without having to build our own viewer.

Add links to the samples on homepage