Currently, MapServer will treat the data projection/type/etc. however you tell it to. I think this is a useful feature for making things work in cases where the source data isn't as perfect as we may all like.
Also, these ESRI rest services aren't GeoJSON (hence OGR renaming the layer to ESRIJSON) and do support arbitrary projections. They also support things like true curves, etc. These properties become important when you need to preserve topology, such as with a parcel layer, and make strict GeoJSON useless in those cases. (Nearly every geospatial tool only re-projects the points instead of properly converting edges to curves and/or adding points to approximate a correct conversion and thus can severely misrepresent the object depending on the old and new projections.) The ability to *internally* abuse the GeoJSON spec with other coordinate systems versus inventing something entirely new, or dealing with the complexities of GML can be helpful here. On 12/10/18 4:00 AM, Passmore, James H. wrote: > Not sure though if MapServer should be supporting any projection other than > urn:ogc:def:crs:OGC::CRS84 as per the formal GeoJSON specification > https://tools.ietf.org/html/rfc7946. > > James > > -----Original Message----- > From: mapserver-users <[email protected]> On Behalf Of > [email protected] > Sent: 07 December 2018 20:00 > To: [email protected] > Subject: mapserver-users Digest, Vol 131, Issue 5 > > Send mapserver-users mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.osgeo.org/mailman/listinfo/mapserver-users > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific than "Re: > Contents of mapserver-users digest..." > > > Today's Topics: > > 1. Re: OGR GeoJSON Layers... (James Klassen) > 2. Re: OGR GeoJSON Layers... (Lime, Steve D (MNIT)) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 7 Dec 2018 10:50:36 -0600 > From: James Klassen <[email protected]> > To: "Lime, Steve D (MNIT)" <[email protected]> > Cc: [email protected] > Subject: Re: [mapserver-users] OGR GeoJSON Layers... > Message-ID: > <CAHqX7961CqiAUDOCGM1BRggf7W5SY8=agnfblkuw7pa7jnq...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > The following works for me with MapServer 7.0.6/GDAL 2.2. Note it doesn't > appear to pass the bbox filter to the ESRI service so this only works with > small layers (otherwise it will timeout). With newer GDAL versions > 'OGRGeoJSON' will likely need to become 'ESRIJSON'. > > > LAYER > NAME 'rcoffices' > TYPE POINT > > CONNECTIONTYPE OGR > CONNECTION " > https://maps.co.ramsey.mn.us/arcgis/rest/services/MapRamsey/MapRamseyOperationalLayersAll/MapServer/1/query?f=json&where=1=1&outFields=*&orderByFields=OBJECTID > " > > DATA "OGRGeoJSON" > > PROJECTION "init=epsg:200068" END > > CLASS > STYLE > SYMBOL "circle" > SIZE 10 > COLOR 255 0 0 > OUTLINECOLOR 0 0 0 > END > END > END > > > Note: epsg:200068 is setup locally as Ramsey County Coordinates: > > +proj=lcc +lat_2=44.88333333333333 +lat_1=45.13333333333333 > +lat_0=44.79111111111111 +lon_0=-93.38333333333334 +x_0=152400.3048 > +y_0=30480.0610 +unit=sft +to_meter=0.30480060960122 +a=6378418.941 > +b=6357033.310 +no_defs > > On Mon, Dec 3, 2018 at 3:13 PM Lime, Steve D (MNIT) <[email protected]> > wrote: > >> Hi all: I’m running into an issue with GeoJSON service URLs vs local >> GeoJSON files. If I setup a connection like so: >> >> >> >> CONNECTIONTYPE OGR >> >> CONNECTION “http://...some arcgis >> server.../arcgis/rest/services...?...query string…” >> >> >> >> and try to draw the layer it seems like it’s fetching features yet >> nothing is drawn. With CONFIG “CPL_DEBUG” “ON” I see an OGR message >> that it was able to open the URL successfully as GeoJSON . Using >> ogrinfo at the command line also works with the URL. >> >> >> >> If I first save the URL response using wget and reference the local >> file, >> e.g.: >> >> >> >> CONNECTIONTYPE OGR >> >> CONNECTION “foo.json” >> >> >> >> then the layer is drawn successfully. I know this has come up at least >> once before on the list but with no resolution. >> >> >> >> This is running MapServer 6.4.5. >> >> >> >> --Steve >> _______________________________________________ >> mapserver-users mailing list >> [email protected] >> https://lists.osgeo.org/mailman/listinfo/mapserver-users > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://lists.osgeo.org/pipermail/mapserver-users/attachments/20181207/c02dc660/attachment-0001.html> > > ------------------------------ > > Message: 2 > Date: Fri, 7 Dec 2018 17:33:39 +0000 > From: "Lime, Steve D (MNIT)" <[email protected]> > To: James Klassen <[email protected]> > Cc: "[email protected]" > <[email protected]> > Subject: Re: [mapserver-users] OGR GeoJSON Layers... > Message-ID: > <sn6pr0901mb23175622c6be1d28b652153eda...@sn6pr0901mb2317.namprd09.prod.outlook.com> > > Content-Type: text/plain; charset="windows-1252" > > It may be my GDAL version, it’s a tad older. I will try and update that. > Might be worth thininking about supporting runtime subs in the OGR url to > pass extent values easily - where MapServer does the substitution using > computed values. Kinda like the bbox hack for PostGIS. > ________________________________ > From: James Klassen <[email protected]> > Sent: Friday, December 7, 2018 10:50:36 AM > To: Lime, Steve D (MNIT) > Cc: [email protected] > Subject: Re: [mapserver-users] OGR GeoJSON Layers... > > The following works for me with MapServer 7.0.6/GDAL 2.2. Note it doesn't > appear to pass the bbox filter to the ESRI service so this only works with > small layers (otherwise it will timeout). With newer GDAL versions > 'OGRGeoJSON' will likely need to become 'ESRIJSON'. > > > LAYER > NAME 'rcoffices' > TYPE POINT > > CONNECTIONTYPE OGR > CONNECTION > "https://maps.co.ramsey.mn.us/arcgis/rest/services/MapRamsey/MapRamseyOperationalLayersAll/MapServer/1/query?f=json&where=1=1&outFields=*&orderByFields=OBJECTID"; > > DATA "OGRGeoJSON" > > PROJECTION "init=epsg:200068" END > > CLASS > STYLE > SYMBOL "circle" > SIZE 10 > COLOR 255 0 0 > OUTLINECOLOR 0 0 0 > END > END > END > > > Note: epsg:200068 is setup locally as Ramsey County Coordinates: > > +proj=lcc +lat_2=44.88333333333333 +lat_1=45.13333333333333 > ++lat_0=44.79111111111111 +lon_0=-93.38333333333334 +x_0=152400.3048 > ++y_0=30480.0610 +unit=sft +to_meter=0.30480060960122 +a=6378418.941 > ++b=6357033.310 +no_defs > > On Mon, Dec 3, 2018 at 3:13 PM Lime, Steve D (MNIT) > <[email protected]<mailto:[email protected]>> wrote: > > Hi all: I’m running into an issue with GeoJSON service URLs vs local GeoJSON > files. If I setup a connection like so: > > > > CONNECTIONTYPE OGR > > CONNECTION “http://...some arcgis > server.../arcgis/rest/services...?...query string…” > > > > and try to draw the layer it seems like it’s fetching features yet nothing is > drawn. With CONFIG “CPL_DEBUG” “ON” I see an OGR message that it was able to > open the URL successfully as GeoJSON . Using ogrinfo at the command line also > works with the URL. > > > > If I first save the URL response using wget and reference the local file, > e.g.: > > > > CONNECTIONTYPE OGR > > CONNECTION “foo.json” > > > > then the layer is drawn successfully. I know this has come up at least once > before on the list but with no resolution. > > > > This is running MapServer 6.4.5. > > > > --Steve > > _______________________________________________ > mapserver-users mailing list > [email protected]<mailto:[email protected]> > https://lists.osgeo.org/mailman/listinfo/mapserver-users > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://lists.osgeo.org/pipermail/mapserver-users/attachments/20181207/da1f2267/attachment-0001.html> > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > mapserver-users mailing list > [email protected] > https://lists.osgeo.org/mailman/listinfo/mapserver-users > > ------------------------------ > > End of mapserver-users Digest, Vol 131, Issue 5 > *********************************************** > > > This email and any attachments are intended solely for the use of the named > recipients. 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