Difficulty when working in QGIS with ArcGIS Map Server Layer

Question

I need to perform a point in polygon analysis in QGIS on parcel data from an Ohio Department Resources MapServer: https://gis.ohiodnr.gov/arcgis_site2/rest/services/OIT_Services/odnr_landbase_v2/MapServer

The parcel layer will load as a MapServer layer, but fails when trying to load it as a Feature Server layer. The other layers from the server will load as a FeatureServer layer. This is the error I get when trying to load it as a feature server:

Layer is not valid : The layer crs='EPSG:3857' filter='' url='https://gis.ohiodnr.gov/arcgis_site2/rest/services/OIT_Services/odnr_landbase_v2/MapServer/4' table="" sql= is not a valid layer and can not be added to the map. Reason: AFSProvider getObjectIds failed: Network error - Operation canceled

Loaded as MapServer layer, I can use the identify features tool to view the attributes of each parcel individually. However, whenever I attempt to perform any functions with the raster, I get the following error:

ERROR 4: ` crs='EPSG:3857' format='PNG32' layer='4' url='https://gis.ohiodnr.gov/arcgis_site2/rest/services/OIT_Services/odnr_landbase_v2/MapServer' table="" sql=' 
does not exist in the file system, and is not recognized as a supported dataset name.

Ideally, I'd like to convert the raster to vector then use it in a point in polygon analysis. Any ideas?

Answer 1

Works in QGIS 3.8+

You can get the vector data with the feature service.

Add a ArcGIS Feature Service with the following url

https://gis.ohiodnr.gov/arcgis_site2/rest/services

and export to your choice of vector format.

Answer 2

Tested with 3.8.3, I get the identical results that you report. A couple of thoughts:

According to https://gis.ohiodnr.gov/arcgis_site2/rest/services/OIT_Services/odnr_landbase_v2/MapServer/4 it should be available as a feature service (for example, the url states Geometry Type: esriGeometryPolygon). It might be worthwhile for you to contact them and see if this error is the result of a boo-boo at their end, or a conscious decision that they made (say to minimize demand on their server due to the layer's large size).

You mention an interest in converting the Map Service raster to vector. If you do, the resulting vector will not have any associated attribute fields (parcel #, address, owner name, etc). It will be nothing more than a vector picture of the Map Service layer; you won't even have the luxury of getting a parcel's info by clicking on it with the Identify Features button. But lack of attribute data may not be important to you...

You might also consider contacting the Ohio DNR GIS Program to see if you could acquire the parcel layer (in vector format, with the associated attribute fields) directly, for example, via an ftp site.