[mapserver-users] Trouble when serving mapcache WMTS to ArcMap clients -

Mark Volz MarkVolz at co.lyon.mn.us
Thu Jul 11 13:27:16 PDT 2019 

James and Others,

Exactly how should SRS in the grid?  Should <srs> change from "EPSG:103749" to " ESRI::103744"

   <grid name="LyonCC">
      <metadata>
         <title>Lyon County, MN</title>
      </metadata>
      <extent>352256 90112 614400 352256</extent>
      <srs>EPSG:103749</srs>
      <resolutions>1024 512 256 128 64 32 16 8 4 2 1 0.5 0.25</resolutions>
	  <units>ft</units>
      <size>256 256</size>
   </grid>




Also,
I did try setting up a mapcache and I think things are starting to work.  However it bugs me because I don’t know exactly why they are working, and if there is anything else I need to do to make the WMTS work even better for other clients.

After making these changes on mapcache on my local machine everything worked fine in ArcMap
*I removed all of the other projections except for Lyon County Coordinates 103749 (note 103744 is for another projection)
*I changed the resolutions to make sure they are powers of two.

Remaining questions
1)Is it required that WMTS services have resolutions with a power of 2?
2)Do I need to share my data at a certain DPI?   I have two ArcGIS test services.  With ArcGIS Online one service works with a DPI of 96, the other with a DPI of 72 does not work in ArcGIS Online.   This may be a limitation of ArcGIS Online as both services work in ArcMap.
3)Is there a reason why ArcMap only wanted to consume WGS_84 instead of Lyon County Coordinates?

Thank You!

Sincerely,
Mark Volz, GISP
Lyon County GIS Coordinator


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Today's Topics:

   1. Re: Trouble when serving mapcache WMTS to ArcMap  clients -
      custom (Passmore, James H.)


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Message: 1
Date: Thu, 11 Jul 2019 16:19:17 +0000
From: "Passmore, James H." <jpass at bgs.ac.uk>
To: "mapserver-users at lists.osgeo.org"
        <mapserver-users at lists.osgeo.org>
Subject: Re: [mapserver-users] Trouble when serving mapcache WMTS to
        ArcMap  clients - custom
Message-ID:
        <CWLP123MB2564D9640030705A0EB53729EBF30 at CWLP123MB2564.GBRP123.PROD.OUTLOOK.COM>

Content-Type: text/plain; charset="utf-8"

I see you have in the GetCapabilities file <ows:SupportedCRS>urn:ogc:def:crs:EPSG:6.3:103744</ows:SupportedCRS>

That's surely wrong, as 103744 is not a valid EPSG code, but one defined by ESRI (https://github.com/Esri/projection-engine-db-doc/blob/master/proj4/esri)

I'm not sure if it would work if you stated it like  urn:ogc:def:crs:ESRI::103744 or just ESRI::103744, but it's possible that ArcMap is trying to do an EPSG lookup, failing and reverting to WGS84

James

Message: 1
Date: Wed, 10 Jul 2019 18:43:05 +0000
From: Mark Volz <MarkVolz at co.lyon.mn.us>
To: "mapserver-users at lists.osgeo.org"
<mapserver-users at lists.osgeo.org>
Subject: [mapserver-users] Trouble when serving mapcache WMTS to ArcMap clients - custom county projection for Minnesota?
Message-ID: <6290ae2cff5b4550891c4480d2eb837f at co.lyon.mn.us>
Content-Type: text/plain; charset="utf-8"

Hello,

I am having trouble serving a Mapserver / Mapcache WMTS service to ArcMAP clients when using my counties projection which is 103749 for Lyon County, MN.  At most tile zoom levels the air photo are further South than where they should otherwise be located.  The only exception is that around 1:6000 the image lines up perfectly.  When I connect ArcMAP to the Mapcache Service using WMS the service works fine however ArcGIS wants to consume the service in WGS_84 instead of county projections.

Is there anything I need to do so that my WMTS service works better between MapServer(Mapcache), ArcGIS, and possibly QGIS?

Reference:
https://linkprotect.cudasvc.com/url?a=http%3a%2f%2fgeomoose.lyonco.org%2fmapcache%2fwmts%2f1.0.0%2fWMTSCapabilities.xml&c=E,1,VAvarNs7aGQKm-cK9kstof_MLmX9XuLjGHuOg5DEXzAEjdJKbLcWTbEGjt-Ql_-yS1OppE29i5-0hyBUhwP2UR0scAyxP7O8tCtRChjdfa6yiTHy8KOY&typo=1


Thank You!
Sincerely,
Mark Volz, GISP
Lyon County GIS Coordinator



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