Perseverance Route Map |
Perseverance Route Map |
Feb 22 2021, 10:16 PM
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Solar System Cartographer Group: Members Posts: 10194 Joined: 5-April 05 From: Canada Member No.: 227 |
Now we are down safely I am starting a map thread. Everything that happens during 2021 will be covered in my still-in-progress atlas, so I have to make the maps for that and everyone can follow as they evolve.
Let me know if any feature names start to show up. Preliminary map even though not much has happened yet. But if you look closely you will see something, even now. Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PD: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Mar 6 2021, 10:14 PM
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Member Group: Members Posts: 248 Joined: 25-February 21 From: Waltham, Massachussetts, U.S.A. Member No.: 8974 |
I had noticed that offset as well. It seems to me that somehow their rover position to base map registration is a little off.
Looking at the network traffic on https://mars.nasa.gov/mars2020/mission/where-is-the-rover/, it turns out that the traverse and waypoints are plotted with a geojson file. traverse: https://mars.nasa.gov/mmgis-maps/M20/Layers...0_traverse.json waypoints: https://mars.nasa.gov/mmgis-maps/M20/Layers..._waypoints.json The geojson has the actual coordinates, and one can use it directly for mapping: The traverse is given by small multiple segments, shown as the grey points. The red waypoints have additional rover orientation data, yaw, pitch and roll. yaw is shown on the map. https://mars.nasa.gov/maps/location/api/con...get?mission=M20 is the overall layer configuration. It has the urls of the geojson geometries. It seem that the web site uses a terrestrial CRS (WGS84) for plotting. Perhaps the rover coordinates are actually for a Mars CRS. That may explain that slight offset depending on the base map projection. -------------------- --
Andreas Plesch, andreasplesch at gmail dot com |
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