Also not a solution, but...
Looks like the returned images have neither a file extension nor a
proper MIME type (just application/octet-stream, i.e. "binary data").
They are JPEG files, but JOSM probably doesn't know that, and I don't
think there's a way to tell it.
The WTMS metadata specifies "format: image/jpgpng", whatever that means.
Just adding a file extension to the request doesn't seem to work, however.
Perhaps iD uses the browser to load the file which probably looks at the
file contents to determine the format.
- Lars
On 03/04/2026 21:55, John Goodman wrote:
Has anyone gotten the new MassGIS 2025 imagery to work in JOSM? I
tried added it using the URL given on https://wiki.openstreetmap.org
/wiki/MassGIS#2025_15cm_Aerial_Imagery (actually, tried both TMS and
WMTS) but I just get "Error: HTTP 200 error when loading tiles",
regardless of zoom level.
Ran in debug mode and the log shows many lines like:
2026-04-03 16:48:01.461 INFO: GET
https://tiles.arcgis.com/tiles/hGdibHYSPO59RG1h/arcgis/rest/services/Massachusetts_Aerial_Imagery_2025/MapServer/tile/15/12120/9917
-> HTTP/1.1 200 (154 ms; 24.8 kB)
2026-04-03 16:48:01.461 WARNING: Image not returned for tile:
https://tiles.arcgis.com/tiles/hGdibHYSPO59RG1h/arcgis/rest/services/Massachusetts_Aerial_Imagery_2025/MapServer/tile/15/12120/9917
content type was: application/octet-stream
Interestingly, I get the same error trying to use the 2023 imagery,
which I know used to work for me. The 2021 and 2019 imagery works OK.
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