Questions tagged [select]
The selection of data from a database based on some criteria.
458
questions
0
votes
0answers
20 views
Wrong vector selected mouse-clicking on computed layer
[qGIS 3.10.14]
Only on computed layer such as virtual or spatialite view:
When simply clicking in canvas (or using any other gui/spatial selection method) to select particular feature(s), what gets ...
3
votes
2answers
101 views
How to select a range of rows with Select by Expression?
I can't find any similar questions as this. Suppose I have a layer with 20 features, and I only want the first ten.
so something like "col1" = 1:10 and then columns 1:10 are selected only.
...
1
vote
1answer
96 views
Select several polygons with the same identifier in GeoJSON layer
I have a map application where:
I load polygons as GeoJSON objects
I draw all polygons in a single layer
I highlight a polygon on mouse hover from a identifier list
Some polygons have the same ...
1
vote
0answers
70 views
Creating a selection set from selected features using select by location
I am trying to convert my VBA code to vb.net. I use “Select by location” to select all the points that intersect lines. Then I want to click a button to put the points into a selection set. Then I can ...
1
vote
0answers
24 views
My selection tool in ArcMap doesn't work
I have been trying to choose some features (rivers) by the selection tool in ArcMap but it seems that it doesn't work. I only have one layer and want to select some features on it. I don't understand ...
1
vote
0answers
38 views
Selecting layers in QGIS autofilling batch Processing: reproducecable bug?
Can someone reproduce the strange behavior I encounter in QGIS? See below ("My workflow") for project settings and workflow. Basically, I want to use GDAL Build virtual raster in batch mode, ...
1
vote
2answers
47 views
SQL select features in a polygon
I have the following code which works fine:
select vissoort, count(1), ST_Buffer(ST_GeomFromText('POINT(5.341248 51.615590)',4326):: geography, 2500)
from visvangsten
where st_intersects(...
0
votes
1answer
29 views
Querying for all rows that have the pattern of a constant value in one field but different values in another field using ArcMap
In ArcGIS (ArcMap 10.8 or Pro 2.6) I have a table of 4000 buildings (rows). Each row/building belongs to one of fifty groups and thus has a group ID of 1-50 in the field GROUP_ID. Each row also has a ...
1
vote
2answers
93 views
Selection of names according to their termination
I would like to select cities in my attribute table according to their suffix. For example: select only cities which end with "ton". How can I do this?
8
votes
1answer
2k views
Selecting features by quartiles in QGIS
I have a polygon layer. I drew a boxplot calculated from field area in the layer.
How can I select the features whose area value is within interquartile range (25%-75%)?
1
vote
1answer
41 views
Showing only selected features of vector layer in PyQGIS [closed]
I am developing a Plugin in QGIS and I want to show only selected parts of a layer. How can I handle this with PyQGIS?
4
votes
2answers
67 views
Selecting only the first row of polygons around polygons
I am currently working on my thesis and after trying for a few days I decided to ask this questions since I guess I'm stuck. I'm working on ArcGIS PRO 2.7.0 with datasets obtained via Esri (online) ...
2
votes
0answers
39 views
Pie charts in QGIS: attributes generated with Expressions not working when using aggregate function
I have a problem to add values generated by expressions with aggregate functions to pie charts (see the screenshot below for better understanding). This question is a follow up question to this one ...
0
votes
0answers
10 views
Selecting Terrain Dataset by elevation in ArcGIS Pro
I have added the Terrain Dataset to my project in ArcGIS Pro. I would like to select the areas which have an elevation above some threshold.
Eventually, I want to use this selection as a clipping mask ...
1
vote
0answers
20 views
How to range vertex select in QGIS 3?
I am a QGIS 2 user and trying to use vertex tool in QGIS 3.
I noticed that there is a feature for QGIS3:
https://qgis.org/en/site/forusers/visualchangelog30/index.html#feature-range-vertex-selection-...
1
vote
2answers
71 views
Selecting only 10000 records from layer using PyQGIS
I would like to join attributes by location of 2 layers. My INPUT layer has 446k records and it is too many. I would like to divide my layer and select for example 10000 records.
For example in Python ...
0
votes
1answer
36 views
Increasing click selection tolerance in ArcGIS Online
Will the 2016 solution listed at Increase FeatureLayer click tolerance work in Web App Builder (ArcGIS Online) or perhaps a newer solution exists?
We have valid feedback:
I am having a little trouble ...
2
votes
1answer
46 views
Filtering out attributes fields of a vector layer using PyQGIS
I have a vector layer with 50 columns/fields. I have been trying to find a way of selecting 6 columns of particular interest (by name or index) and then creating a new layer from that selection, such ...
1
vote
1answer
46 views
Selecting more than one point using QGIS
I am trying to convert the monasteries layers from:
https://harvard-cga.maps.arcgis.com/apps/View/index.html?appid=b4dad589ee4b40e39a93bb0b026e4ee8
into a csv table. For that I am using the WMS link:
...
0
votes
1answer
46 views
Can Survey123 have a select_one create another respective select_one that repeats
Per boss's request, I need to make a survey that is broken into 3 different Test Well sections, where each Test Well has an associating list of Monitoring Wells. Basically, field tech will choose the ...
3
votes
1answer
78 views
Several QGIS layers sharing single shapefile
Is it possible for several QGIS layers to share a single attribute file, but each layer containing a different set of features from that one shapefile based on the value of an attribute?
0
votes
0answers
24 views
Selecting more than layer with polygon selection or select by location with different CRS in QGIS 2.18 [duplicate]
I want to select more than one layer in the same time, select by polygon not rectangle.
2
votes
2answers
105 views
How do I precisely select lines within a polygon in QGIS?
I want to select lines (bahnstrecken) within a polygon (bundesland). My goal is a selection shown in the following screenshot, which I did manually. Before I used two tools: I converted the polygons ...
1
vote
0answers
24 views
Speed up colouring of contour lines by creating new layer?
Related to my previous question: Colouring contour lines differently when they are inside polygons of another layer I would like to create a new layer based upon the result of the geometry generator ...
1
vote
0answers
58 views
Filter a QGIS report to get only selected features information
I have a layer with about 28000 points. What I'm trying to do is create a report showing just the information of the selected points, but looking at the report manager options I have not found an ...
2
votes
1answer
41 views
Select features that do not intersect with another polygon in QGIS
See the image below. What I want to do is select all features that do NOT intersect with the features of the selected layer. How do I go about doing this?
1
vote
2answers
67 views
Selecting the smallest number for each ID-group using ArcMap
I have attribute table with duplicate "ID" numbers, i.e. "1,1,2,2,3,3,....." and there is a unique number value in another field. I want to select the smallest number for each &...
2
votes
1answer
208 views
Selecting features by mouse click using PyQGIS
I am following a tutorial where I am trying to learn how to use PyQGIS to programmatically accept a user's feature selection from the map canvas of QGIS by mouse click. I have encountered a problem ...
2
votes
0answers
114 views
QGIS select multiple features by value
I have a polygon layer and every polygon has a unique gml_id. I want to select multiple at the same time. Normaly I use selection by expression and it works very well. I fount the tool select by value ...
1
vote
1answer
101 views
Layer selectByExpression is Not select any feature even Expression is right why?
I am trying select the features by expression if i pass query as string its working but if pass variable is not return any result why.
WORKING CODE
InputFeatureLayer.selectByExpression("\"...
1
vote
3answers
179 views
Creating definition query from selected features using ArcGIS Pro
I have a layer with 2000 or so points, and I selected 50 of them (with no attributes in common, they were randomly chosen). Now I want to make a definition query, so should I will only visualize these ...
3
votes
1answer
177 views
A column was specified that does not exist error - ArcGIS
I have some code that ran just fine on ArcMap 10.7 in May, but is now giving me an error when trying to create a new shapefile. The join that precedes the code that throws an error succeeds, and when ...
0
votes
0answers
72 views
How to get the value of specific pixels in Google Earth Engine
I want to extract the value of some pixels.
I have already select the pixels that I want to extract the value with this code:
var pixel_snowcover = glacierfilled_M1.select('albedofill1').map(...
3
votes
3answers
178 views
Duplicating layer, copies all records, NOT JUST selected records using QGIS
The requirement is to display only selected records as a New Layer pointing to same source data on disk. If I were selecting using attributes of the current layer it would be simple - I use the filter ...
0
votes
0answers
32 views
Selection of objects on different layers
How could I select two different objects from two different layers using code or in the QGIS interface itself?
An example.
I have two elements in two different layers; that green dot, and the orange ...
-1
votes
3answers
49 views
Deleting rows that have the same attribute value
I need to delete one of the two rows that have the same DestinationID and bigger value in Total_TravelTime.
0
votes
0answers
28 views
Making selection with ModelBuilder using parameter
I am using ArcMap 10.5.
I am trying to calculate the volume and area of a pit using ModelBuilder (I need a non-python solution). The pit will by preselection have the largest volume of any pits in the ...
3
votes
0answers
120 views
Selecting features by current map extent in QGIS 3
I'd like to select all features in the current map extent that also satisfy some other condition via "Select by Expression".
For instance I'd like to do something like this:
intersects($...
0
votes
0answers
17 views
Selecting attributes using ArcGIS Pro [duplicate]
Note the attributes selected.
I would like to select the attributes that cross two polygons.
Note the darker polygons represents a overlayed polygon.
I can do this manually, but is there a tool in ...
0
votes
0answers
27 views
Selecting attributes or rows of polygons that intersect two attributes of overlaying polygon using ArcGIS Pro
I would like to highlight census tracts that overlap and touch two precincts. Most tracts are contained within a precinct, but a few touch more than one. I would like to highlight these.
I am using ...
0
votes
0answers
54 views
Vector tile selection layer (canvas) drawn outside the map div. Bug?
I loaded a PBF vector tile layers into my map, and when I select a feature, OpenLayers 6.3.1 creates the selected layer canvas outside the map.
Is it a general problem, or just mine?
I don't attach ...
0
votes
1answer
39 views
Calculate field: expression is not defined [duplicate]
I'm tyring to write a script the allow me to select a layer by location, then calculate a field of the selected feature. But I'm having issue with CalculateField_management.
Here part of the script:
...
1
vote
2answers
110 views
Only show features, related to a selected feature in another layer (QGIS)
I have: ways (tracks) and points (way signs). The tracks are outgoing from the way signs.
This should be the visible result:
The ways with name 'A' are visible (coloured) because the related way ...
1
vote
1answer
35 views
Trouble with syntax of preselection in a cursor
I am trying to determine the maximum values in a column [1] in relation to a column [2]. For this purpose I have written all occurring values of column [2] in a list and now I want to make a selection ...
1
vote
0answers
25 views
Select attribute from a layer
I'm trying to show an array of selected field values in HTML in the map composer.
So far, this works but only for a specific value1 :
[% array_to_string( array( attribute(get_feature('layer', '...
0
votes
0answers
16 views
Identifying where selected features are
I am able to select the features from the attribute table but my data is so small that I am unable to identify where the selected features are. The features selected are from a raster attribute table ...
1
vote
1answer
47 views
How to add geometry to current section in arcpy?
I looping through feature class. I want select the features that are 3 meters distance but not intersected features. I know we can do by select layer by location or attribute.
with arcpy.da....
0
votes
0answers
71 views
Selection on PostGIS layers is… randomly working in QGIS
Context
Quick question...
Since the last minor update of QGIS 3, I cannot select features anymore on some (not all) PostGIS layers (see Fig.1).
Fig.1: On the left table, the selection is not ...
0
votes
1answer
23 views
Selecting polygons that meet minimum containment of certain raster cell value using ArcGIS Desktop
I have a census block shapefile with a land cover TIFF underneath it. The Raster layer has three different cell values. I am trying to select the census blocks that have a minimum of 50% of cells ...
1
vote
1answer
73 views
QGIS sum selected line lengths
I need a tool which displays the sum of selected lines as I go in QGIS. Something like the Measure line-tool. I´m new to PyQGIS. The logic seems quite simple, I just don´t know where to start. I guess ...
