Timeline for Translating EPSG:4326 lon lat coordinates to xy using pyproj
Current License: CC BY-SA 4.0
28 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| S Aug 28, 2020 at 6:28 | history | bounty ended | interwebjill | ||
| S Aug 28, 2020 at 6:28 | history | notice removed | interwebjill | ||
| Aug 24, 2020 at 18:00 | history | tweeted | twitter.com/StackGIS/status/1297956847924781056 | ||
| Aug 21, 2020 at 21:22 | vote | accept | interwebjill | ||
| Aug 21, 2020 at 21:12 | answer | added | FSimardGIS | timeline score: 5 | |
| Aug 21, 2020 at 16:05 | comment | added | interwebjill | The basemap was constructed using EPSG:4326, so I am assuming that there is a distortion, which would be most apparent moving from the equator toward the poles, that does not correspond to an x, y Cartesian placement of lon, lat coordinates. If this doesn't make sense, I can rephrase. | |
| Aug 21, 2020 at 10:50 | comment | added | Ture Pålsson | It does indeed seem like your basemap is in the (somewhat brutal) "projection" of letting x=longitude and y=latitude. To me, who knows little about earthquakes, the positions of your circles look plausible (you get them in California, Iceland and S. E. Asia, but not in Sweden :-) ). What is the problem you are seeing? | |
| Aug 21, 2020 at 7:55 | history | edited | interwebjill | CC BY-SA 4.0 | added 13 characters in body |
| Aug 21, 2020 at 7:49 | comment | added | interwebjill | I have updated the post with images of the basemap as well as the result of drawing the circles at the lon, lat coordinates from the USGS data. | |
| Aug 21, 2020 at 7:48 | history | edited | interwebjill | CC BY-SA 4.0 | added 449 characters in body |
| Aug 21, 2020 at 7:12 | history | edited | interwebjill | CC BY-SA 4.0 | added 89 characters in body |
| Aug 21, 2020 at 5:14 | comment | added | Ture Pålsson | This does not add upp. EPSG:4326 is not a projection, it is a geodetic datum, but it could be taken to mean "just plot longitude along the X axis and latitude along the Y axis", in which case there is no need to drag pyproj into the equation. Are you sure your basemap is just unprojected lat/lon? Could you put a link to the map image somewhere so we can have a look at it? And regardless of which projection it is, a circle on the surface of the planet almost certainly won't project to a circle on the map. | |
| S Aug 21, 2020 at 2:29 | history | bounty started | interwebjill | ||
| S Aug 21, 2020 at 2:29 | history | notice added | interwebjill | Draw attention | |
| Aug 20, 2020 at 22:26 | history | edited | interwebjill | CC BY-SA 4.0 | added 62 characters in body |
| Aug 20, 2020 at 22:24 | comment | added | interwebjill | x, y in relation to an image of width, height with origin at the upper left. This is in the code but I'll spell it out in the description. | |
| Aug 20, 2020 at 20:11 | comment | added | bugmenot123 | X/Y in relation to what? | |
| Aug 20, 2020 at 19:57 | history | edited | interwebjill | CC BY-SA 4.0 | edited body |
| Aug 20, 2020 at 18:55 | history | edited | interwebjill | CC BY-SA 4.0 | added 268 characters in body |
| Aug 20, 2020 at 11:56 | history | edited | interwebjill | CC BY-SA 4.0 | removed image because it had a different center and might confuse things |
| Aug 19, 2020 at 17:15 | history | edited | interwebjill | CC BY-SA 4.0 | added 79 characters in body |
| Aug 19, 2020 at 16:42 | history | edited | interwebjill | CC BY-SA 4.0 | added 205 characters in body |
| Aug 19, 2020 at 9:22 | history | edited | interwebjill | CC BY-SA 4.0 | rephrased the description of the x y positions on the basemap that I am trying to find |
| Aug 19, 2020 at 9:18 | comment | added | interwebjill | I've rephrased that description. Thanks. | |
| Aug 19, 2020 at 9:17 | history | edited | interwebjill | CC BY-SA 4.0 | rephrased the description of the x y positions on the basemap that I am trying to find |
| Aug 19, 2020 at 9:05 | comment | added | nmtoken | I'm not sure how you can have a (not-georeferenced) global EPSG:4326 basemap. Either the base map is in EPSG:4326 and therefore georeferenced, or it's just a map image with no CRS. Can you edit the question to expand on what you mean by the statement. | |
| Aug 19, 2020 at 8:45 | comment | added | nmtoken | Note, EPSG:4326 coordinates are in lat/long order | |
| Aug 19, 2020 at 2:24 | history | asked | interwebjill | CC BY-SA 4.0 |