Timeline for QGIS Wrong "ELEV" values from contour
Current License: CC BY-SA 4.0
14 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 30, 2020 at 14:31 | vote | accept | Satcar | ||
| Apr 29, 2020 at 13:19 | answer | added | user30184 | timeline score: 0 | |
| Apr 29, 2020 at 12:47 | history | edited | Satcar | CC BY-SA 4.0 |
added the map to raster step (I forgot to put it at first but looks like commenters understood my question without it)
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| Apr 29, 2020 at 12:41 | comment | added | Satcar | @user30184 forgot to notify my reply: I believe that the DEM I'm working with is real since it's from an official website, but I don't know how to check this. After some investigation, I feel like the "pixelvalue" is the correct elevation value, but I have no clue how to label it on my contour layer. | |
| Apr 29, 2020 at 12:36 | comment | added | Satcar | @ValP That's the WMS I'm working with: geoserveis.icgc.cat/icgc_mdt2m/wms/service? There are 3 maps, the DEM one is called "Mapes d'elevacions del Terreny 2m". | |
| Apr 28, 2020 at 13:07 | comment | added | Satcar | EDIT: Looks like the "elev" value I'm getting is neither of those (stretchedvalue / pixelvalue). I picked a random point and found that the elev value was 42, the stretchedvalue was 29 and the pixelvalue 268.9 | |
| Apr 28, 2020 at 6:39 | comment | added | user30184 | You get probably RGB images with 8 bits per band from WMS. So the data range of the red band is 0-255. Are you sure that you are now dealing with a real DEM and not with an image that is generated from DEM for visualizing purposes? I guess that the original DEM is of 32 bit float type. | |
| Apr 27, 2020 at 19:01 | comment | added | Gerardo Jimenez | Does the red band has slevetion values or image/pixel values? | |
| Apr 27, 2020 at 16:59 | comment | added | Val P | I am trying to replicate your process and it works fine with me. Which version of QGIS are you using? Can you share projection and WMS? | |
| Apr 27, 2020 at 16:33 | history | edited | Vince | CC BY-SA 4.0 |
removed thanks
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| Apr 27, 2020 at 16:31 | comment | added | Satcar | I import a DEM layer from WMS and then I create the contours with the "contours" process | |
| Apr 27, 2020 at 16:15 | comment | added | Val P | Are you having your contours created by a WMS layer or are you importing a raster saved in your PC? | |
| Apr 27, 2020 at 16:08 | review | First posts | |||
| Apr 27, 2020 at 16:10 | |||||
| Apr 27, 2020 at 15:52 | history | asked | Satcar | CC BY-SA 4.0 |