Linked Questions
21 questions linked to/from Extracting raster values at points using Open Source GIS?
3
votes
1
answer
636
views
Creating/generating centroids point features from raster image in console in QGIS [duplicate]
I have a 1-band TIFF/raster file showing a value for each raster cell. I want to get those cell/pixel values of the TIFF extracted to a CSV file.
I guess there are two ways of doing this.
First, ...
1
vote
1
answer
393
views
Load Raster Values into Shapefile [duplicate]
I have a shapefile containing many points.
Some of these points fall within an area for which I have raster data.
I would like to load the values of the raster which underlie each point into the ...
0
votes
0
answers
161
views
Converting points to raster and back again in QGIS? [duplicate]
To convert raster grids to vector points In QGIS there we have different possibilities (grass tool "to.vect"; saga tools "grid values to points").
My problem is a little bit complicated. In the ...
1
vote
0
answers
141
views
How to extract elevation data from ASTER/SRTM? [duplicate]
I just want to know if there are any other tools available in QGIS apart from the Point Sampling tool to extract elevation data from ASTER/SRTM/CartoDEM (for India) data? When I convert these images ...
7
votes
3
answers
3k
views
Seeking software for opening .img files?
I have some cpc precipitation data stored in IMG format.
Could anyone suggest a software beside ERDAS imagine or Arcgis which can be freely downloaded?
2
votes
4
answers
10k
views
Labelling contour lines in QGIS?
I need to label contour lines in QGIS 2.14. I've tried a few things, including Choosing only one contour line to label in QGIS? but it labels with the IDs instead of altitude.
EDIT: I've created the ...
3
votes
2
answers
3k
views
Extracting raster values at points for GRASS GIS
I have points shapefile and a raster file. For each point, I want to extract the raster value which overlaps that particular point. This has been done in QGIS (link below) but I was looking for a ...
7
votes
1
answer
3k
views
How to get elevation profile from .tif dsm on the web map?
I have my dsm .tiff file, pixels are floating point 32bit values giving the terrain elevation in metres. I need to create a web map where user can draw a path and get elevation profile for that path. ...
0
votes
1
answer
6k
views
Project points to a vector layer and get z elevation at QGIS
I have one point file and one dtm vector file (with elevation contours as well as point elevation information).
How can I project points to the vector file and get z elevation of them?
2
votes
2
answers
715
views
Adding slope values to attribute table (QGIS 3)
I have a DEM raster and some points (one .shp for all points) plotted on it.
I would like to know if there is a way to add the slope value of the pixel that each point is located in the attribute ...
2
votes
1
answer
1k
views
Assigning elevation data to GPX from LIDAR data
I have some GPX files which have elevation data, but I am aiming for greater accuracy. Currently I have used OS benchmarks to correct the barometric elevation data. Online digital elevation models (...
7
votes
1
answer
940
views
How can I get a numerical (or value) display for equal intervals in a layer?
I'm looking to classify regions on a map by the amount of light pollution in the area. I have the varied intensities (0 through 60) plotted using a color map, but is there anyway that instead of a ...
6
votes
1
answer
723
views
Extract many or clustered cells attributes around points using SAGA GIS?
My question is similar to Extracting raster values at points using Open Source GIS?, but perhaps more complex.
How to extract the attributes of clustered cells around a point/points?
For example,...
2
votes
1
answer
426
views
Split millions of points in shp with 100'000 points each [closed]
I havie over 8 million points in a shapefile. Now I would like to split these 8 mio points into parts of 100'000 points each, in order to facilitate further calculations with these points.
In the end ...
1
vote
1
answer
801
views
Alternative profile graphs for ArcGIS
Anybody know an alternative to profile graph option for ArcGIS 10.2? 3D Analyst can produce a profile, however it's extremely bare bones and doesn't include a scaling option.
Does anybody know an ...