WMTS in WorldMap

[capooti]

@blewis @wendy-guan as per last email: GeoExplorer right now don't support WMTS layers. In order to display WMTS layers a WMTS plugin must be implemented, which may not be a really easy operation.
I am filing this ticket in order to update you on this issue.

[wendy-guan]

Is this related to, or the same as, #10 ?

[blewis]

I'm removing #10 and bringing those options I described here to consolidate:

The idea is that we are looking for the most sensible approach and if that means finding a TMS version or converting WMTS to TMS that is fine. TMS is supported in GeoNode, right?

1. Find TMS or other version of these same layers that work. Can GeoTIFF versions of these be found or created?
2. Can MapProxy be used to cascade a WMTS into a TMS or WMS which can be handled normally as a base map or regular layer?
3. Write a WMTS plugin for Geoexplorer, load layers manually as base layers.
4. Write a WMTS plugin for Geoexplorer, add WMTS harvesting to HHypermap. Add WMTS layer loading to Map composition client.
   NOTE: Is new plugin needed for map composer or layer page or both?

[blewis]

These are key layers for Japan. Perhaps we bring them in another way if WMTS doesn't work?

1. the layer in Japanese: https://maps.gsi.go.jp/xyz/std/{z}/{x}/{y}.png
2. the satellite layer: https://maps.gsi.go.jp/xyz/seamlessphoto/{z}/{x}/{y}.jpg
3. the boundary layer: https://maps.gsi.go.jp/xyz/blank/{z}/{x}/{y}.png

They are famous and widely used so I think that they are most suitable for base layer.
I guess that it is quite useful if we can chose them as one.

====
These also might be relevant for Japan

1. https://gsi-cyberjapan.github.io/experimental_wmts/gsitiles_wmts.xml
2. https://gsi-cyberjapan.github.io/experimental_wmts/gsitiles_wmts_light.xml

====
Here is the China endpoint:
http://gis.sinica.edu.tw/ccts/wmts

[capooti]

if they are WMTS they need a WMTS source in GeoExplorer
I can have a try proxying them in MapProxy and see if they can be loaded as WMS-C or TMS in the map composer. Keep in mind that if we proxy them there will be a much larger load on Hypermap if using them as base layers.

[capooti]

These are key layers for Japan. Perhaps we bring them in another way if WMTS doesn't work?

1. the layer in Japanese: https://maps.gsi.go.jp/xyz/std/{z}/{x}/{y}.png
2. the satellite layer: https://maps.gsi.go.jp/xyz/seamlessphoto/{z}/{x}/{y}.jpg
3. the boundary layer: https://maps.gsi.go.jp/xyz/blank/{z}/{x}/{y}.png

which is the standard or format used by these services?

[wendy-guan]

Please provide instructions to Wang Lijun on how to add any of the maps in http://gis.sinica.edu.tw/ccts/wmt. Thanks!

[wendy-guan]

In http://gis.sinica.edu.tw/ccts/wmts, only the first layer (the one now added to staging) is in jpeg format. All other layers are in png format. So the solution now can only work on the first layer but not the rest of the layers. Please demonstrate the ability for adding png format layers using 清代歷史地圖(Qing), id=ad1820.

[capooti]

@wendy-guan png is supported. I have just added a layer from this service: https://services.arcgisonline.com/arcgis/rest/services/Demographics/USA_Population_Density/MapServer/WMTS/ and you can notice that is succesfully displayed in GeoExplorer.

I spent a couple of hours to figure out why that layer (ad1820) isn't displayed by GeoExplorer.
It looks like the sinaca server is returning an error (500) when sending requests for tiles from that layer, for example:

http://gis.sinica.edu.tw/ccts/wmts?SERVICE=WMTS&REQUEST=GetTile&VERSION=1.0.0&LAYER=ad1820&STYLE=default&TILEMATRIXSET=GoogleMapsCompatible&TILEMATRIX=4&TILEROW=7&TILECOL=11&FORMAT=image%2Fpng

This is instead not happening with the other layer, AMS L500 (sinica server correctly returns a valid tile):

http://gis.sinica.edu.tw/ccts/wmts?SERVICE=WMTS&REQUEST=GetTile&VERSION=1.0.0&LAYER=AMS_L500&STYLE=default&TILEMATRIXSET=GoogleMapsCompatible&TILEMATRIX=6&TILEROW=25&TILECOL=50&FORMAT=image%2Fjpeg

I'd suggest to check with sinica staff (if possible) if they have something in the logs which can be used to address the error.

[wendy-guan]

Please try the following and see if you can add any one of them successfully. These are the historical maps Prof. Xu cares the most. It would be surprising if none of them works. Thanks! <ows:Title>西漢歷史地圖(W. Han)</ows:Title><ows:Identifier>bc0007</ows:Identifier> <ows:Title>東漢歷史地圖(E. Han)</ows:Title><ows:Identifier>ad0140</ows:Identifier> <ows:Title>三國歷史地圖(Sanguo)</ows:Title><ows:Identifier>ad0262</ows:Identifier> <ows:Title>西晉歷史地圖(W. Jing)</ows:Title><ows:Identifier>ad0281</ows:Identifier> <ows:Title>東晉歷史地圖(E. Jing)</ows:Title><ows:Identifier>ad0382</ows:Identifier> <ows:Title>南北朝歷史地圖(South and North)</ows:Title><ows:Identifier>ad0497</ows:Identifier> <ows:Title>隋代歷史地圖(Sui)</ows:Title><ows:Identifier>ad0612</ows:Identifier> <ows:Title>唐代歷史地圖(Tang)</ows:Title><ows:Identifier>ad0741</ows:Identifier> <ows:Title>北宋歷史地圖(N. Song)</ows:Title><ows:Identifier>ad1111</ows:Identifier> <ows:Title>南宋歷史地圖(S. Song)</ows:Title><ows:Identifier>ad1208</ows:Identifier> <ows:Title>元代歷史地圖(Yuan)</ows:Title><ows:Identifier>ad1330</ows:Identifier> <ows:Title>明代歷史地圖(Ming)</ows:Title><ows:Identifier>ad1582</ows:Identifier> <ows:Title>清代歷史地圖(Qing)</ows:Title><ows:Identifier>ad1820</ows:Identifier>

[capooti]

Unfortunately no one of them seem to work using GeoExplorer which relies on OpenLayers (an old version, maybe now it was improved).
I see that they are working on QGIS, I would be curious to check what is the QGIS request format to see what could be the difference, let me check if there is a way.

[capooti]

@wendy-guan would it be possible to ask sinica why one request works and the other not? That would help

[wendy-guan]

Sure. You may write to them directly. The contact info is here: https://ccts.sinica.edu.tw/contact.php?lang=en. Thanks!

[capooti]

@wendy-guan @blewis I added WMTS support in Hypermap Registry today. Now it is possible to register a WMTS endpoint in Registry and use it from the WorldMap search interface based on Solr.

For example in CAMP create a new map, and search for the Esri demographics layer (in Registry it is here: http://128.31.22.46:8001/registry/hypermap/service/bd6b5a3c-1e5b-4e29-beea-01855c163791/):

Add the layer in the map and it should be displayed as in this picture: