Questions tagged [values]
The values tag has no usage guidance.
67
questions
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Exctracting values and their coordinates from a raster layer in QGIS?
I would like to extract the pixel value and coordinates of each of them from a ndvi raster layer. I don't have a point layer from where I can extract those values, as I read in other posts.
...
- 63
0
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1
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345
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Interpolate the gaps among NDVI values [closed]
I want to calculate the Crop Water Requirements and for this I need NDVI values for a period of time.
Because I have Sentinel 2 images and the temporal resolution is 5 days, I need also the values ...
8
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2
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2k
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Finding the minimum value of different columns in QGIS
I'll try to calculate the minimum value of four different columns in my QGIS table like:
The min. value would be 1,50286 in the first row.
Is there any expression or tool to find the minimum value ...
- 183
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64
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ArcMap 10.6: Is it possible to extract point values from points?
I've got three point shapes with different fields that I cannot seem to merge as I get ERROR 000229: cannot open 'name of shapefile'. Instead of solving this error, I wanted to try something different:...
- 351
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QGIS-Export Raster Values to a .csv file
I use a Raster, based on .png and .pgw file. (plans from a town)
The plans include information about where buildings are allowed to be built and maximum building height, ground elevation etc.
Now i ...
- 19
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22
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Making the results from function a string [closed]
I am trying to get the features count from feature, then put it in a dictionary that I can call later:
ct_dict = dict()
...
fipsList = ['13245','06007']
for fip in fipsList:
mergedJoinCentroids =...
- 1,913
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921
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PostGIS: Change raster values depending on values from other raster
I have two rasters and I want to change all the values from "raster1" to 4, where they are larger than the values from "raster2" and to 0, where they are smaller.
So raster2 has only one value, which ...
- 31
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227
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Polygonizing distinct values using QGIS?
I am using QGIS 3.0.3 and I am trying to create simulated data through two sets random points distributed along two gradients of values (photo below). Using the raster calculator I created two ...
1
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1
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722
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Null values being interpolates as 0 in QGIS
I have a file with data fields which I have imported as CSV. When I look at the Field Attribute Table, the empty fields appear clearly as NULL values. However when I interpolate the data, the NULL ...
- 105
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419
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Return a set of unique pixel values in a raster with PyQGIS? [closed]
I am trying to test whether a value exists in a raster against all the values present. I am using pyqgis (Python 2.7) in in QGIS 2.14. I have found a number of ways to get point location values and ...
- 131
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75
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ArcMap correct Errors in Attribute Table
I want to replace the all the -9999 values in my attribute table with 0.
Does anyone know an easy way to do this?
- 393
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810
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Extracting Z-Values from SHP with geotools and vividsolutions?
I use the java libraries geotools and vividsolutions to extract xyz data from a shapefile (Vienna from this example).
This works perfectly fine for x and y data, but all coordinate values for z are ...
- 175
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1
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162
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Creating buffers with values, and finding areas with high value overlap of these buffers
I'm working on a project where, essentially, I'm measuring threat levels based on geospatial patterns. I have different groups with higher or lower threat levels based on the distance from their ...
- 31
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99
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File Geodatabase: storing text in an integer field?
I recently downloaded a FGDB from NOAA at https://marinecadastre.gov/ais/
The FGDB contains a point feature class with ship locations. One of its attribute fields, named [Status], is of type Long ...
- 8,192
2
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99
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Returning attribute values without additional characters
I have this part of code inside of a plugin:
Emptylist = []
def saveToList(self, layer, EmptyList):
for feat in layer.selectedFeatures():
attributes = feat[self.pgLyr.currentText()...
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