mapseed/geo-muncher

geo-muncher

geo-muncher's Issues

let's munch some King County data

http://gismaps.kingcounty.gov/arcgis/rest/services

• 1936 aerial imagery: http://gismaps.kingcounty.gov/arcgis/rest/services/BaseMaps/KingCo_Aerial_1936/MapServer/

Try this script - https://github.com/tannerjt/AGStoShapefile @Lukeswart
(^ that is quite buggy, but this looks promising: https://github.com/Bolton-and-Menk-GIS/restapi)

ESRI integration

The purpose of this issue is to document configuration patterns we encounter when trying to work with ESRI data, and hopefully formulate strategies for dealing with different situations.

A lot of public data is made available over ESRI REST Services endpoints. While we do have a way to use such endpoints in Mapseed (via the esri-leaflet-renderers package), performance and appearance tend to be poor.

Certain ESRI endpoints expose open formats, including WMS, WMTS and GeoJSON, but it seems to be up to the agency or organization that controls the data whether or not to expose these services. In practice there's a grab-bag of formats available.

Below are a few configuration patterns we've encountered and examples of each.

WMS

A WMS request for metadata might look like this: https://www.fws.gov/wetlands/arcgis/services/Wetlands/MapServer/WMSServer?request=GetCapabilities&service=WMS

We can use Leaflet to construct a series of calls to WMS endpoints to retrieve tiles.

WMTS

WMTS is a cached version of WMS. A request for metadata might look like this: https://basemap.nationalmap.gov/arcgis/rest/services/USGSHydroCached/MapServer/WMTS?request=GetCapabilities&service=WMTS

We can use a Leaflet plugin to construct calls to WMTS endpoints. Performance tends to be quite good.

GeoJSON

A request for data might look like this: https://fortress.wa.gov/dnr/arcgisext/weba_ext_prod3/rest/services/Geology/WADNR_Surface_Geology_Web_Mercator/MapServer/28/query?where=1%3D1&f=geojson

Note that GeoJSON requests are often rate-limited, and a single request may only return a subset of the full data. Check the MaxRecordCount parameter in the metadata to see the rate limit for a given endpoint.

ESRI JSON

A sample request might look like:
https://fortress.wa.gov/ecy/ecyprodgislb/arcgis/rest/services/TCP/CleanupSitesStatic/MapServer/0/query?where=1%3D1&f=json

ESRI format

A sample request might look like this:
https://fortress.wa.gov/dnr/arcgisext/weba_ext_prod3/rest/services/Geology/WADNR_Surface_Geology_Web_Mercator/MapServer/28

Duwamish GIS needs

• Dept. of Ecology - toxic & hazardous sites

Create a heat map of a city's hottest areas

Functional Spec

User should be able to select a heat map from the legend.

The heat map should have either a legend or hover over effects

Have a time slider for different years?

Technical Spec

• Download data (raster satellite image)

  • EPSG 4326?
  • Be wary of the resolution of the data
  • Landsat band 10, the thermal band, might be useful. Looks like AWS has it available here: https://aws.amazon.com/blogs/aws/start-using-landsat-on-aws/

• Process the raster image into a new format (eg: raster or vector)

  • Using SAGA?

• Load into Geoserver

  • handle the proper projections
  • Connect w/ app