Hello Sander,
1. Had issues with 4326 to 3301 transformation,the extent and all
that. (OpenLayers could manage but QGIS couldnt). Previously only
had ows_extent.
Is ows_extent even a thing? This only shows wms_extent
https://mapserver.org/ogc/wms_server.html#layer-object-metadata
Should you use wfs_extent and wms_extent instead?
the wms_ / wfs_ / ows_ / oga_ (coming in MapServer 8) Metadata-entry are
aiming on your output. So, if you only want to serve wms, you only need
the wms_*.
wfs_* conigures your WFS-server. If you want to serv wms and wfs and the
parameters are the same, you can use ows_ instead.
1. My layer is doing an OGR connection directly to the API URL. Works
fine. My question is, the API renews itself every 2 minutes (new
data).
How does Mapserver handle the request with that connection? I move
the map (openlayers), there's a new Mapserver request - does
Mapserver make a new request to the API endpoint and get a new json?
Or is there some sort of cache?
No cache by default. MapServer requests the data source every time
mapserver gets itself a getmap or get feature info request (or
getfeature when serving wfs). So your WMS serves the actual data any
time. If you want a cache, you have to configure mapcache or mapproxy
separately.
1. Am I missing something else from the Metadata that I should consider?
I don't see anything missing
Jörg
Am 09.02.22 um 10:26 schrieb Sander Pukk:
Hi there!
Trying to use a geojson output from API directly in Mapserver layer.
Geojson is per standard, 4326, but my Mapserver and OL (the client) is
configured to 3301.
We have hundreds of layers (mostly from Postgres) at the same time and
the system works.
No other direct API ones.
The current MAP file's WEB part looks like this:
WEB
METADATA
"wfs_title" "title"
"wfs_enable_request" "*"
"wms_enable_request" "*"
"wfs_encoding" "UTF-8"
"wms_title" "title"
"wms_encoding" "UTF-8"
"wms_onlineresource"
"url/mapserv?map=/app/gis/infokihid/infolayers_other.map&"
"wfs_onlineresource"
"url/mapserv?map=/app/gis/infokihid/infolayers_other.map&"
"ows_srs" "EPSG:3301 EPSG:3857
EPSG:4326"
"ows_enable_request" "*"
"wfs_getfeature_formatlist" "gml,geojson"
"wms_feature_info_mime_type"
"application/json,application/json;
subtype=geojson,application/vnd.ogc.gml,text/plain"
END
END
PROJECTION
"init=epsg:3301"
END
And the layer:
PROJECTION
"init=epsg:4326"
END
METADATA
"wfs_srs" "EPSG:3301"
"gml_msGeometry_type" "line"
/ #"ows_extent" "40500 5993000 1064500 7017000" copy paste
lon and lat from these 3301 coordinates from other layer's
capabilites/
"ows_extent" "14.9318705986602 53.7681633673032
35.1060366818735 63.2747817924556"
"wfs_extent" "14.9318705986602 53.7681633673032
35.1060366818735 63.2747817924556"
"wms_extent" "14.9318705986602 53.7681633673032
35.1060366818735 63.2747817924556"
"ows_title" "road_restrictions"
"ows_abstract" "road_restrictions"
"ows_keywordlist" "road_restrictions"
"ows_include_items" "all"
"gml_include_items" "all"
"ows_featureid" "id"
"gml_exclude_items" "edges,geometry"
"ows_exclude_items" "edges,geometry"
END
Couple of questions I have which I didnt really find answers for:
1. Had issues with 4326 to 3301 transformation,the extent and all
that. (OpenLayers could manage but QGIS couldnt). Previously only
had ows_extent.
Is ows_extent even a thing? This only shows wms_extent
https://mapserver.org/ogc/wms_server.html#layer-object-metadata
Should you use wfs_extent and wms_extent instead?
2. My layer is doing an OGR connection directly to the API URL. Works
fine. My question is, the API renews itself every 2 minutes (new
data).
How does Mapserver handle the request with that connection? I move
the map (openlayers), there's a new Mapserver request - does
Mapserver make a new request to the API endpoint and get a new json?
Or is there some sort of cache?
3. Am I missing something else from the Metadata that I should consider?
With kind regards,
Sander
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Viele Grüße,
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