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Questions tagged [attribute-table]

A tabular set of data linked one-to-one to a set of spatial features.

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21 views

Sorting and deleting attribute features from shapefile [duplicate]

I am polygonizing a single band raster and creating an area field to the shapefile. I want to keep the 10 largest polygons by area and delete the rest. The following script computes the area for all ...
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44 views

Seeking complete guides on How To Extract data from Attribute Table using Python [closed]

I am not a Python user but if I can learn how to extract data using python then maybe that will make my work faster and easier. The guide must be on QGIS 3.4 or later. Can you link me some guides?
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1answer
38 views

Deleting features with Null value in attribute field

I have polygonized a single band raster and created an area field. I want to keep the 10 largest polygons by area and delete the rest. The following script computes the area for all polygons and sorts ...
2
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1answer
40 views

Double cascading value relation in QGIS attribute form

I run a PostgreSQL database using QGIS as a frontend. I have a table in which I store archaeological finds related to sites. The finds-table has no geometry and just stores date. To be able to query ...
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35 views

Qgis-Replace file path in attribute table 'invalid Expression' [closed]

I wan't to replace my filepath in the attribute table but I'm always getting an invalid expression. I already tried to double the backslashes but I didn't work out.
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21 views

Is it possible to wrap text in column headers in print composer tables using QGIS 3.x? [duplicate]

Is it possible to wrap text in the header of an attribute table in print composer in QGIS 3.x? There are options for wrapping text in the cells within the body, but they don't seem to work for the ...
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1answer
40 views

Extract/export Attribute Table of pixel information from Classified Raster in Python?

I am at beginner level in image processing with python. I have classified satellite image with python in 10 classes. I am able to write the image in geotiff format. However, I do not know how extract ...
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1answer
38 views

Calculate attribute table field using a near function (or a similar function)

I'm having an attribute table with a field called 'name' which represents the streetnames of an area. The streetnames are derived from OSM, but unfortunately not all street (or parts of streets) have ...
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2answers
48 views

Loading and appending new data (in x,y format) using QGIS

I have a daily task where I need to loads and append 25 points into the same QGIS layer. Can anybody guide me, how to achieve this task? Currently it loads and replace the data in the existing layer ...
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1answer
51 views

Summarizing Attribute Table Based on Condition

I have a one-to-many joined table (i.e. duplicated AssetIDs with other different attributes), and I would like to consolidate the table (20 records) into one single record. However, when using ...
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1answer
38 views

Selecting elements by grouping with one attribute and specific rule using QGIS

I have a question about a specific query for a Shapefile-Layer in QGIS 3.4. I have a Point-Shapefile with the name point.shp. The Shapefile has a lot of different points with a large amount of ...
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1answer
39 views

CSV attribute table to polyline shapefile

I have a .csv file that is an exported attribute table that I would like to reconstruct as a polyline shapefile (for reasons beyond my control I cannot access the original shapefile from which the ....
2
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1answer
37 views

Calculating number of rows for seperate objects (shapefiles) at once in QGIS

I have around 750 seperate shapefiles of species distribution data. For each species i want to calculate the number of atlas squares it occures in. Doing this for each object seperately seems a ...
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0answers
37 views

QGIS 3.4 Layout manager, attribute table, scale of map

I am trying to produce maps faster than I currently do. I was thinking to use the "show only features visible within a map" option. I already use it for the coordinates table and I am trying to add ...
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1answer
34 views

QGIS 3.10 attribute table change to default or modify when export the layer to different format

When I export my newly digitalized layer I noticed, that my data attribute changes. In the QGIS I set the data attribute table like this: but each single export to the different format change it, as ...
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1answer
25 views

Select ArcMap attributes that are in CSV

Is there an ArcMap 10.1 method for selecting only attribute rows that have an identifier in common with those in a CSV sheet? I exported an attribute table (5000 rows) and eliminated all but the ...
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0answers
29 views

Create a land-use raster in which the “crop cells” are distributed in dependency on the slope?

I have a geo-"scientifical" question. If you don’t know the answer, but have a hint how to search for the solution, this information would be helpful as well! In Germany we do not get land-use data ...
4
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3answers
196 views

Calculating attribute with formula in QGIS

I want to build a QGIS formula where I calculate one attribute from 10 others, and I only need to sum them up. My Problem is, that I don't get the actual values of the attributes. I thought about ...
1
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1answer
44 views

Editing attribute using PyQGIS

I'm trying to automate a simple repetitive task on QGIS. I have some shapefiles with varying number of features in a layer and about 10 different attributes for each feature. I need to add the same ...
2
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1answer
52 views

How to copy attributes from many columns to one, QGIS3

I have many columns, about 30 and each of those has some attributes. I want to merge those columns to one and collect all attributes in a row of columns. I tried with this post but it is not for I am ...
4
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1answer
102 views

Get the reference of Attribute Table while opening in QGIS

I have a problem related to this question and the script. I can add some functionalities to Attribute Table (AT) by the script in the post. But according to the post, I have to open the AT using ...
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1answer
26 views

Use column from Raster Attribute Table as Legend in Leaflet Map

I have a simple RasterLayer in R. I added a column to the attribute table and would like to use these values in the legend of my leaflet-map. The RasterLayer looks like this: > layer1 class ...
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0answers
37 views

One polygon layer for an area with different projects in the same layer?

I was wondering if it is possible (maybe not ?) to make a structure so that I can have diffrient information (projekts) over the same area/point in the same layer. This would be for an overview of the ...
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17 views

Possible to make an import raster in attribute field in Qgis?

I was wondering if it is possible to make a link/action so when i click on this in the attribute it will import the georeferenced raster? I don't know if it is possible to make an action/link so when ...
4
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1answer
74 views

Zoom to feature by clicking cell in the Attribute Table

I have a layer which has FID field representing the unique ID of features. In QGIS, there is a Zoom to selected rows button on top of the Attribute Table. It has a shortcut (Ctrl + J) and it doesn't ...
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2answers
143 views

Switching road names from uppercase to mixed case in ArcMap?

Our county road data has road names for all roads in the county. In the attribute name field, there are some entries with all uppercase for the road name and some with mixed case. I would like to go ...
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41 views

Deleting fields from an attribute table

I have a layer that was constructed by multiple dissolve, merge, join's etc. by a previous person. So unsurprisingly the table is a complete mess. I only need 2 or 3 out of the 20 something fields ...
2
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2answers
68 views

Labelling features based on 2 attributes QGIS

I'd like to label cities that exceed 10,000 inhabitants. In my attribute table, I have the name of cities in one column, and in another, the amount of inhabitants. Is there a way to write down an ...
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2answers
45 views

Numerical fields decimals limited by default

I'm using ArcMap 10.5.1 and working from a geodatabase. I just want to limit the number of decimal numbers shown to 1. Currently 6 decimals are shown, and I know I can reduce them manually by opening ...
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1answer
32 views

Graduated symbol for percentage attribute in QGIS

I want to use the Graduated Symbol style for a field which contains values in percentages. When I select the Graduated Symbol this field does not appear in the drop down box. Is there a way to make ...
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2answers
134 views

Copying features from one attribute table to another using QGIS

I am struggling with copying the data from one attribute data table to another. I have a few columns in my data attribute table, which I want to update. I can do it one by one, but its a long process, ...
4
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1answer
46 views

Referencing a polygon layer in the field calculator of a point layer to make a virtual field

I have a polygon layer that shows the counties of England and a point layer of project sites. I am trying to make a new virtual field within the point layer that will reference the county that it is ...
2
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1answer
42 views

Values disappear after joining .csv file to shp layer in QGIS

I am joining a .csv file to shp layer and it goes well except all the values from the .csv file disappear (there's NULL in the attribute after the join)? I don't have X & Y coordinates, but I'm ...
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1answer
27 views

Adding GPS coordinate points to point feature class using ArcGIS Pro

I have a raster, and in ArcGIS Pro 2.4, I created a point shapefile with 830 points. I forgot to specify that I wanted to show the GPS points in the attributes table of each point. However, I need to ...
5
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2answers
153 views

QGIS “open attribute table” as tab

How open layer's attribute table as tab? Before reinstall OS on QGIS 3.8 I opened layer's attribute table as tab, after on QGIS 3.10 I can't find this option.
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1answer
66 views

Forcing virtual field recalc in attribute table in QGIS

I have a layer with a virtual field, "LongLabel", an expression concatenating several of its data fields. When I edit a feature's data fields in the layer's attribute table/form, how can I force the ...
4
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1answer
140 views

QGIS incredibly slow when trying to update large tables?

My point postgresql table has about 500k rows and about 20 columns People have about 5 fields that they update, the other fields are static Selecting the points is fairly instant, however using the ...
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0answers
13 views

Dynamic text colour in ArcGIS Pro Table Frame

Has anyone figured out a way to alter the text properties (colour, boldness, font, etc.) of a table element based on a specific property in ArcGIS Pro? For example, I want to add tables to a layout in ...
0
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1answer
41 views

Looping through raster files to create attributes using dictionaries in ArcPy

I have a lot of output land cover raster files in .tif and want to only select the .tif files and change color map of all of them by taking a script that has attributes for Red, Green, Blue and LC ...
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1answer
25 views

Rasterization - choosing attribute from attribute table for cell value of raster - why?

When a polygon shapefile is converted into a raster, an attribute from the shapefile's attribute table must be chosen for the cell value of the raster. I am pretty sure the above statement is ...
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2answers
57 views

String column in QGIS shapefile that is read as a factor column in R

I have a shapefile that has 3 columns (ID_1, NAME_1 and Rainfall). The 2nd column contains the names of governorates (type of variable is string). I have used the sf package in R to read this ...
2
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1answer
47 views

Some features listed in attribute table not visible on map in QGIS

My vector layer is a track file with points every 2-3 seconds. When added they all appear in the attribute table but not on the map view. There doesn't seem to be a pattern or any attribute that ...
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1answer
21 views

I import a KMZ into QGIS but I would like to display the path name next to path in QGIS

I have a KMZ/KML file I import into QGIS. The file in Google Earth has track names but after importing to QGIS, only the tracks/paths are visible. How do I get the individual path names (which I can ...
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1answer
38 views

Getting Elevation Data for Elevation Attribute using ArcGIS Pro

In ArcGIS Pro, how can I insert the elevation data into an attribute table? There is already an elevation field created, and the feature class is set to where all features are on the ground, so you ...
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2answers
68 views

Editing fid to match row number using QGIS?

Tried editing it but it wont allow to save the edit.
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0answers
49 views

QGIS Reset Attribute Table Views

I have a geodatabase file with attributes columns that exist in the correct order, however, when I view the attribute table in QGIS it re-sorts that order (possibly due to a previous copy-paste of ...
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1answer
75 views

Auto populate fields with different values from another field in QGIS?

Is it possible to populate a number of fields in a shapefile in QGIS with different values based on the values of one other field? Essentially what I want to be able to do is to populate fields to ...
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0answers
20 views

ArcGIS 10.4.1 export attribute table loses 'shape' column

I'm running ArcGIS 10.4.1 under Windows 10. Until a couple of days ago I wasn't having any trouble with exporting attribute tables to csv, editing the resultant files in Excel (Office 365, build ...
2
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1answer
38 views

Using field calculator to populate one column using other data in same table in ArcMap

I'm not the best with using the field calculator of ArcMap and I'm unsure of what's wrong with my VBScript Basically the new column needs to contain data pulled from the same row in the following ...
2
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0answers
28 views

Attribute table for shapefile showing nonsense symbols on my PC [duplicate]

I am working with a shapefile which has several hundred rows and 10 or so columns. Usually, the cells contain data, but at the moment they are just showing nonsense symbols (attached). I have tried ...