Questions tagged [values]
The values tag has no usage guidance.
19
questions with no upvoted or accepted answers
3
votes
1
answer
251
views
How to recover parent value while creating parent and child layers in a embedded forms setup?
I read the documentation, examples and made many attempts, but I still can't make this work.
What I want is to get a value from a parent layer while editing a child layer, when both features are being ...
- 567
3
votes
0
answers
106
views
Reading row values instead of field values with PyQGIS
I use this piece of code to read the values of fields:
lyr = iface.activeLayer()
features = lyr.getFeatures()
for feat in features:
attrs = feat.attributes()
print attrs[1]
How can I read ...
- 31
1
vote
1
answer
37
views
I can't update any attribute values in PyQGIS
I've been using PyQGIS for a few of weeks. I'd write a script which shows all earthshakes responding to given parameters, so I wrote this code:
from PyQt5.QtGui import *
from PyQt5.QtCore import ...
- 11
1
vote
0
answers
124
views
Autofilling based of value map in QField
Is it possible to prepare a Value Map with autofilling? I have a list of almost 500 plant names and it is difficult to find correct name on my device (phone with Qfield) while scrolling. Is it ...
- 11
1
vote
0
answers
227
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 ...
1
vote
0
answers
104
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 ...
- 11
0
votes
0
answers
33
views
Displaying specific field values of attribute table in QGIS Print Layout
I am building a layout where I want to add the attribute table of the map and only display the maximum and minimum values of a field. I think there is the option to filter by expression but I am not ...
- 41
0
votes
1
answer
34
views
How to generate values and create a heatmap from 3 different point vector layers in QGIS
I am new to QGIS and would like to turn what I have into a heatmap.
I have 3 different sets of points that go across the map of a UK (see the image attached) that represent coastal marine habitats. ...
- 1
0
votes
0
answers
20
views
Reclassify by table
I'm using IFSAR 5x5 DEM Raster and run a Reclassify by Table with only 5 values 1, 2, 3, 4 and 5. Then I converted the reclassified raster into Polygon. When I checked the attribute table the values ...
0
votes
0
answers
136
views
LANDSAT-7 strange strip on SWIR bands (B5 and B7)
I was exploring Landsat 7 data on SentinelHub and came across with this strange strip in the SWIR band B7 (also B5):
By placing a pin in this strip and exploring the stats, I found that there is no ...
0
votes
0
answers
37
views
Nested for: I execute changeAttributeValue in the outer loop, print it and is still NULL... but inner loop works kind of fine?
A bit hard to explain, untill now my script is:
I have a for, where:
if an "Analized" attribute is NULL, I will change it to "Parent",store a "Join Value" attribute in a ...
- 33
0
votes
0
answers
108
views
Extracting average value at point using ArcGIS Pro
I have a dataset of over 500 points that represent the location of a number of site boundaries and a Tif file displaying the wind speed data over the study area.
Is it possible using ArcGIS Pro to ...
- 163
0
votes
0
answers
423
views
Changing raster pixel values outside of polygon box using rioxarray
How do I change all raster pixel values outside of a polygon (keep the original values inside polygon) into a certain value?
I have passed through rioxarray clip() like below from this link:
...
- 67
0
votes
0
answers
83
views
Projecting raster changes the range of values
I am trying to project a 1 second DEM from GDA94 to UTM56 in ArcMap using the Project Raster tool. I tried different methods: bilinear, cubic, nearest neighbor. Nevertheless, the values of the output ...
- 31
0
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0
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119
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MOD04_L2 data processing in r
i am new to using r, so i excuse in advance for asking basic question. I have been trying to convert MOD04_L2 data into GeoTIFF and extract value to a district shapefile in R. the coding seems to work ...
