All Questions
6 questions
3
votes
1
answer
371
views
Finding highest point relative to point data
I'm very much a beginner with QGIS (3.10.4) and I'm still learning terminology etc so my understanding is currently quite basic. I'm trying to find out the highest point of a hill relative to a point. ...
- 31
2
votes
1
answer
445
views
Get altitude value from WMS
If I load a WMS service into QGIS I could query with the selection tool for every pixel the altitude value. Where does QGIS get this altitude value from? A WMS does not normally have any altitude ...
- 21
0
votes
0
answers
49
views
Altitude information for European highways
I need to calculate the gradient in major European highways. Fot this I need altitude data for each highway, let's say every 100 meters.
Are there such kind of data publicly available? If not, I am ...
- 65
0
votes
0
answers
162
views
Why is QGIS not recognising altitude from CSV file?
I used the Google Earth method for creating a KML file of points with latitude, longitude, and altitude as necessary information. After that I converted the KML file to GPX and then to CSV, through ...
2
votes
0
answers
416
views
Correcting slope of river bed on DEM using QGIS or ArcGIS
I have a DEM that has incorrect value of altitude/slope in the river bed area. This is a result of the interpolation of elevation value that are close to the river and creates lots of errors.
In fact ...
1
vote
0
answers
63
views
Use of Airbus WorldDem altimetric values (EGM2008)
In France, the altimetric values are issued from a mesure of heights above the sea level based on the Marseille's tide gauge. If i didn't mess it up, the system is named NGF - IGN69 for mainland (See ...
- 7,888