Hi there,
Using the Vector Tiles plugin, we can request a GeoJSON vector tile in WGS-84 using WMS, because the bbox is in lon/lat and the srs is specified as epsg326. When we use the gmaps endpoint of GeoWebCache, we request a GeoJSON vector tile according to the Google Maps gridset, however, the feature coordinates in the GeoJSON vector tile are also expressed in EPSG:900913 / EPSG:3857.
Is there another GeoWebCache endpoint we should be using to request a vector tile using the Google Maps gridset, but receive the feature coordinates in the GeoJSON vector tile expressed in EPSG:4326?
Many thanks in advance.
Cheers,
Edward
On 11-01-17 12:08, Edward Mac Gillavry wrote:
Hiya,
As expected, upon requesting the GeoJSON with srs defined as epsg:4326,
I get the feature coordinates in WGS-84 indeed:
Request:
http://localhost:8080/geoserver/top10nl3d/wms?service=WMS&version=1.1.0&request=GetMap&layers=top10nl3d:buildings&styles=&bbox=3.36234426498413,50.7371864318848,7.22960090637207,53.494010925293&width=768&height=547&srs=EPSG:4326&format=application%2Fjson%3Btype%3Dgeojson
Response:
{"type":"FeatureCollection","totalFeatures":"unknown","features":[{"type":"Feature","id":"buildings.NL.TOP10NL.100075742","geometry":{"type":"Polygon","coordinates":[[[3.407618,51.258059],[3.407618,51.260075],[3.409632,51.260075],[3.409632,51.258059],[3.407618,51.258059]]]},...
Also, the features are stored in PostGIS in 4326 too.
Thanks,
Edward
On 10-01-17 23:36, Dave Blasby wrote:
Hi,
What happens when you directly request the data from WMS (in geojson format)?
Thanks,
Dave
On Tue, Jan 10, 2017 at 1:10 PM, Edward Mac Gillavry
<edward@anonymised.com> wrote:
Dear all,
We're currently creating a setup using the Vector tile plugin [1]. Using
the Gmaps enpoint of GWC, we're getting GeoJSON tiles that adhere to the
XYZ-grid. However, as the gridset explicitly states EPSG:900913 as the
SRID, we're also getting the feature geometries in that reference
system, instead of WGS-84:
Request:
http://localhost:8080/geoserver/gwc/service/gmaps?layers=top10nl3d%3Abuildings&zoom=16&x=33585&y=21673&format=application/json;type=geojson
Response:
{"type":"FeatureCollection","totalFeatures":"unknown","features":[{"type":"Feature","id":"buildings.NL.TOP10NL.102751244","geometry":{"type":"Polygon","coordinates":[[[499736.54,6783910.47],[499744.66,6783925.15],[499732.23,6783932.07],...
Any other endpoint we should be using instead to obtain tiled GeoJSON in
lat/lon or had we better use the WMS?
Cheers,
Edward
[1]
http://ares.boundlessgeo.com/geoserver/2.10.x/community-latest/geoserver-2.10-SNAPSHOT-vectortiles-plugin.zip
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