ArcGIS Layer GridSetBuilder incorrect axis ordering

[esemplare]

Testing 1.23.RC1 for WMTS of an ArcGIS Tile Cache, first release since 1.10.5 that works (#1012).

The cached tiles are EPSG:4326. Here is an excerpt of the conf.xml

<SpatialReference xsi:type='typens:GeographicCoordinateSystem'>
      <WKT>
        GEOGCS[&quot;GCS_WGS_1984&quot;,DATUM[&quot;D_WGS_1984&quot;,SPHEROID[&quot;WGS_1984&quot;,6378137.0,298.257223563]],PRIMEM[&quot;Greenwich&quot;,0.0],UNIT[&quot;Degree&quot;,0.0174532925199433],AUTHORITY[&quot;EPSG&quot;,4326]]</WKT>
      <XOrigin>-399.99999999999989</XOrigin>
      <YOrigin>-399.99999999999989</YOrigin>
      <XYScale>11258999068426.24</XYScale>
      <ZOrigin>-100000</ZOrigin>
      <ZScale>10000</ZScale>
      <MOrigin>-100000</MOrigin>
      <MScale>10000</MScale>
      <XYTolerance>8.9831528411952133e-009</XYTolerance>
      <ZTolerance>0.001</ZTolerance>
      <MTolerance>0.001</MTolerance>
      <HighPrecision>true</HighPrecision>
      <LeftLongitude>-180</LeftLongitude>
      <WKID>4326</WKID>
    </SpatialReference>
    <TileOrigin xsi:type='typens:PointN'>
      <X>-180</X>
      <Y>90</Y>
    </TileOrigin>

The ordering is expected to be yCoordinateFirst when being loaded by ArcGIS Javascript API. This value is hardcoded in GridSetBuilder to false.

https://github.com/GeoWebCache/geowebcache/blob/1.23-RC1/geowebcache/arcgiscache/src/main/java/org/geowebcache/arcgis/layer/GridSetBuilder.java#L61

It seems there is some history regarding the axis ordering with 4326 and looking at other OGC GetCapabilities Request and WMTSCapabilities.xml online; TileSets of EPSG:4326 specify [lat lon] for the top left corner; but for CRS84 it is [lon lat].

Setting that value to true fixes my issue. Should yCoordinateFirst change based on the detected CRS?

Some references:

• https://docs.geoserver.org/2.22.x/en/user/services/wfs/axis_order.html
• https://docs.geotools.org/latest/userguide/library/referencing/order.html
• https://wiki.esipfed.org/CRS_Specification
• https://docs.opengeospatial.org/is/13-082r2/13-082r2.html (Requirement 7 /req/simple-profile/wmts-profile-world-crs84)

[marsikv]

Could it be related to the fact that when publishing a TPK created in ArcGIS Pro in EPSG:2180 (Poland), the map display of WMTS is offset somewhere in the Indian Ocean?