Questions tagged [values]
The values tag has no usage guidance.
21
questions
2
votes
3answers
35 views
Extracting pixel values in different bands for different points giving NAs and not pixel values
I am working with R statistics. And I am trying to extract pixel values for each point in each Landsat bands, however, I am just getting NAs instead of getting pixel values
Does anyone have any ...
0
votes
1answer
33 views
Deleting values minor of 0.31 in NDVI raster layer in QGIS
In my research I have a Ndvi raster layer, and I want to delete the values corresponding to bare soil, which are those minor of 0.31. Therefore, I will obtain a new raster layer with those values ...
1
vote
1answer
37 views
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.
...
0
votes
0answers
21 views
Listing all domains and their coded values into table via ArcPy?
I am new to Python. I'm trying to gather a list of all of our Domains (we have a lot) and their coded values and export them into a table or a format that can easily be put into a table. I've had luck ...
0
votes
1answer
56 views
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 ...
0
votes
1answer
44 views
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:...
1
vote
1answer
164 views
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 ...
0
votes
1answer
21 views
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 =...
0
votes
2answers
213 views
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 ...
1
vote
0answers
122 views
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 ...
0
votes
1answer
158 views
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 ...
1
vote
1answer
147 views
How do you 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 ...
1
vote
1answer
42 views
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?
3
votes
1answer
359 views
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 ...
3
votes
1answer
64 views
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 ...
0
votes
0answers
51 views
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 ...
0
votes
0answers
63 views
Converting feature to raster, missing values
I have converted many features from the same shapefile to rasters, but am now getting an issue where values are missing. Converting the percentage values in column a212 (data type long) produces a ...
1
vote
0answers
84 views
Problem with the attribute table values, they are replaced with ************
I suddenly have a problem with my attribute table. When I change a value the whole line is messed up because values shift and the value I add is replaced by ***********. How can I avoid this from ...
1
vote
2answers
91 views
Correlating number values with text values from different fields in ArcMap?
I need to create a vector layer for representing the geology of an area. I have the geological map, a raster file.
I made some polygons and I named them in the attribute table, but I don`t want to ...
7
votes
1answer
937 views
How to create predefined values in a field in PyQGIS?
I would like to make by programmation (python) the same thing than we can do directly in QGIS when you create a list of values for a field.
I would like to create a new field and specify a list of ...
3
votes
1answer
567 views
Setting a default value in a QGIS creates empty field
I use Qgis 2.18.3 and tried to set default values in new column in a existing shapefile via the layer properties as described here: Setting a default value in a QGIS field
or here
How to set a default ...
