Open discussions on specific topics selected by the Software Working Group and selected from the list of SWG Topics For Discussion.
Tuesday, May 3, 2022 Open Layers and Web Mapping moderated by Max Burnette
Slides: https://uofi.box.com/s/gg3yfrej1dgf2all3bd7dx3sj3rqwvp6
Recording: https://uofi.box.com/s/x91ydr0kbios51uqzrwxjsmuji6sy0ly
Attendees:
@Valentino Constantinous
Sandeep Puthanveetil Satheesan
Discussion:
See slides for Presentation
Sandeep discussed using a geoserver and open layers with farmdoc. There is keycloak used for authentication, and kong is the API gateway
In Thunderstorm, we would verify their location and allow them to see a specific parcel of land. Based on your authentication you can zoom into a specific location from the state level, which is the largest.
In CoverCrop there is open source, then an authenticated backend, so people can see some things, but need to make an account to see everything.
Jim Phillips notes he uses C++
Is there a serverless geoserver available?
YOng Wook made some suggestions that an html file offers a legend etc.
Mike Bobak noted that he used Leaflet for ECO files. People also use Geoblacklight, but knows nothing about it.
Geoblacklight is being used by a lot of universities as an open source
Visu says Leaflet is lightweight and may have lack of usability.
Chen notes they are using geoserver that allows several overlays.
Jim wants to flip layers on and off quickly. Having all the layers showing really slows things down.
Max had two images showing, one in the background, one in the frontground so the screen never showed a blank screen. Using too many layers really slows things down.
Permafrost uses cesium. There is a javascript client. There are billions of shape files for this project.
Max talked about lidar data and programs that can handle it.
Can the geodashboard be used on mobile devices as well as laptops and desktops? The visualization will be different, and it's not ideal, but it can be done.
To support a map for a mobile device, it needs to be much simpler. For mobile maps, google shows just the map and not the legend on the side.
Jeff Terstriep talked about moving a server into the browser particularly for cloud tiffs. It gets clunky.
Discussion about tiles and vector tiles in open layers.
Kastan Day notes that PDG is running into performance issues even with web-optimized .png files. Vector tiles would be a larger size, right? Changing vector tiles to png's vastly (with rasterization) decreases the size of the image.
Links mentioned in this Round Table:
https://leafletjs.com/examples/mobile/
https://openlayers.org/workshop/en/cog/
https://openlayers.org/workshop/en/vectortile/
If you are interested in contributing to a Round Table, please see these links: