[mapserver-users] Mapserver URL request layer
Sander Pukk
sander.pukk at gmail.com
Wed Feb 9 02:44:39 PST 2022
Hei!
I got my answers. Thanks guys!
Sander
On Wed, Feb 9, 2022 at 12:35 PM Jörg Thomsen (WhereGroup) <
joerg.thomsen at wheregroup.com> wrote:
> 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
>
> _______________________________________________
> MapServer-users mailing listMapServer-users at lists.osgeo.orghttps://lists.osgeo.org/mailman/listinfo/mapserver-users
>
>
> --
> Viele Grüße,
> Jörg Thomsen
>
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> WhereGroup GmbH
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