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Questions tagged [values]

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28 votes
3 answers
58k views

Reading attribute values using PyQGIS

What is the way to get the information contained in the attribute table, say in column 2, row 2 using PyQGIS?
user16018's user avatar
  • 299
11 votes
1 answer
2k views

Creating predefined values in field using PyQGIS

I would like to make programmatically (with 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 ...
Etienne's user avatar
  • 557
8 votes
2 answers
2k views

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 ...
Walther's user avatar
  • 183
7 votes
2 answers
407 views

Classifying raster layer by number of equal values in given area using QGIS

I am using QGIS 3.16.12 - Hannover. I have a binary raster layer which consists of 2 values, either 0 or 1 (in my screenshots, 0 = black, 1 = white). The 1 values are scattered throughout the layer in ...
Snowy's user avatar
  • 113
3 votes
1 answer
162 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 ...
Bryan Parent's user avatar
3 votes
1 answer
1k views

How to create a Value Map widget type to select multiple values (checklist) from the dropdown?

I have a polygon layer that represents tree/shrub planting sites that were done. As part of the attribute table, I have fields representing things like tree density, species, soil work, tree size, etc....
Robert's user avatar
  • 43
2 votes
1 answer
367 views

QGIS3 - Simple automation of QGIS output - turn values on/off & print out dozens of maps

I need to make a series of maps of a single location and make a single map for each value in the layer. I have a layout I've created with borders, texts, north arrow, and everything, with the map, and ...
Mike P's user avatar
  • 29
1 vote
1 answer
3k views

Sorting dictionary values and getting sorted keys in new dictionary using Google Earth Engine

How can I sort a dictionary's keys in Earth Engine based on their values? For example, I have such a dictionary defined in Earth Engine after some calculations and I want to sort that based on ...
Solmaz's user avatar
  • 149