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OneGeology / TechnicalDiscussion

A location for TIG, TAG, and any future OneGeology technical group to discuss technical issues surrounding portal, catalogue, service implementations, etc
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Slow rendering of OneGeology backdrop (in Japan ) #83

Open nmtoken opened 2 years ago

nmtoken commented 2 years ago

JB at Geological Survey of Japan reports that OneGeology backdrop is very slow to render compared with other backdrops in the portal

OpenStreetMap, OpenTopoMap, and Bing backdrops are served through externally hosted tile services, whilst the OneGeology backdrop is served as an inline base64 image data:image/png;base64...

Not sure if this affects other regions.

Not sure of the rationale behind this way of serving the OneGeology backdrop. Could there be any merit in switching to using a tile server?

nmtoken commented 2 years ago

JB further comments that:

The OneGeology backdrop is very slow using Firefox and Chrome running on Windows and Chrome and Safari on Mac (http and https versions

nmtoken commented 1 year ago

@Amayafv to further clarify, this is a problem affecting users of the portal in Japan, and is not something we can test in Europe.

Perhaps we could add a tile server version of the OneGeology Backdrop as an alternative using a tile service, (as well as the existing base64 image). That way we can test if performance is improved in Japan.

hramambazafy commented 1 year ago

[In progress] Someone is working on the subject to set up the tile service

nmtoken commented 11 months ago

From discussion on 24/10/2023, will look at changing default base map (and/or removing the current default). This option has previously been discussed see: https://github.com/OneGeology/TechnicalDiscussion/issues/22

nmtoken commented 10 months ago

Japan, have confirmed the Bing backdrop (Virtual Earth https://ecn.t1.tiles.virtualearth.net/tiles/) works about 10 secs faster for them on the staging platform over the performance of the current OneGeology backdrop on the production platform.

We must now evaluate whether there will be any cost (money) or usage restrictions if we switch to it, as per issue 22

nmtoken commented 8 months ago

The backdrop does seem to be coming from the BRGM hosted Carte du monde Onegeology WMS service (mapsref.brgm.fr/wxs/1GG/monde1GG?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetCapabilities), perhaps we can revert to using this directly, rather than going throigh some intermediary conversion