[pygeoapi] image based map tile providers

[Just van den Broecke]

Hi Travis,

You are right: the current implementation only supports Vector tiles, 
with sources from either a stored file-hierarchy or from a remote URL. 
Like Tom said the Provider type needs to be MVT.
You may be lucky that some tile requests may work, but I suspect not as 
the MVT Provider (data URL) implementation is geared towards the 
"MapBox" protocol. The documentation needs amending.

The OGC spec [1], still in draft, distinguishes among "tiles", actually 
Vector Tiles and "map tiles", actually raster tiles (as the follow-up 
from WMTS). Each has its own URL/API-pattern. If you are into Python a 
new pygeoapi Provider for "map tiles" may be added. There is already an 
Abstract Base Class Provider tile.py. We can support you in  that effort.

[1] http://docs.ogc.org/DRAFTS/20-057.html

Best,

Just van den Broecke

On 03/05/2022 21:50, Tom Kralidis wrote:
> Hi Travis: can you try with name: MVT in your provider setup?
> 
> Thanks
> 
> ..Tom
> 
>> On May 3, 2022, at 11:55, Travis Kirstine <traviskirstine at gmail.com> 
>> wrote:
>>
>> 
>> Are image map tile providers supported?
>>
>> It appears that MVT works but not image based services.  In the docs 
>> it indicates that "- type: tile" is allowed but this will throw a 
>> invalid plugin error:
>>
>>   File 
>> "/home/ubuntu/pygeoapi/lib/python3.8/site-packages/pygeoapi-0.13.dev0-py3.8.egg/pygeoapi/plugin.py", 
>> line 94, in load_plugin
>>     raise InvalidPluginError(msg)
>> pygeoapi.plugin.InvalidPluginError: Plugin tile not found
>>
>> My basic config:
>>
>>     mycollection:
>>         type: collection
>>         # collection info ......................
>>         providers:
>>             - type: tile
>>               name: image
>>               data: https://tile.openstreetmap.org/{z}/{x}/{y}.png 
>> <https://tile.openstreetmap.org/{z}/{x}/{y}.png>
>>               options:
>>                   zoom:
>>                       min: 0
>>                       max: 21
>>                   schemes:
>>                       - WebMercatorQuad
>>               format:
>>                   name: png
>>                   mimetype: image/png
>>
>> _______________________________________________
>> pygeoapi mailing list
>> pygeoapi at lists.osgeo.org
>> https://lists.osgeo.org/mailman/listinfo/pygeoapi
> 
> _______________________________________________
> pygeoapi mailing list
> pygeoapi at lists.osgeo.org
> https://lists.osgeo.org/mailman/listinfo/pygeoapi