Questions tagged [attribute-table]

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

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22 views

Assigning values to empty field in attribute table

In my attribute table, I have a field with empty slots. Though, I want to add Christchurch to fill all of these empty slots for this one particular column. I have thousands of rows, and wish not to ...
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1answer
42 views

Changing QGIS attribute table appearance

How can I change the appearance of the attribute table in QGIS, so that I can view the cell's font an its size smaller in my computer's screen?
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1answer
36 views

Assigning a weight to thousands of values in the attribute table to then make a heat map in QGIS 3.10

I am working with some data that has about 19,000 values. This data has been imported as a text delimited file layer, as it is GPS (long and lat) point value data, that has an associated metadata or ...
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33 views

Conversion to longitude/latitude

I am very new to GIS. I wanted to find out if it is possible to convert coordinates as specified in the table below to longitude and latitude c
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20 views

Spatial join (Points to Polygons) joining points that do not fall inside polygons to attribute table

I am using ArcMap 10.6.1 and am having trouble with a spatial join. I have created 250km buffer polygons around some of my sampled data points and I am now trying to join some modelled data to those ...
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56 views

Set position of attribute table extended to next page

I am creating a script to export an attribute table in pdf format with PyQGIS 3. The number of features is different regarding the farmer. pdf_table = QgsLayoutItemAttributeTable.create(layout) ...
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42 views

QGIS and QField show different behaviour regarding a Value Relation with Filter Expression

I added a Value Relation Widget in the Attributes Form of a shapefile in order to generate a drop-down menu that is supposed to make fieldwork more efficient. The idea is to have an optional filter ...
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24 views

Merging values in print composer table

Is there a way in qgis to merge repeated values in attribute table print composer? Something like on the second image bellow.
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1answer
53 views

Compare two shapefiles by location and attribute in QGIS

I am looking for a way to compare two shape layers automatically. We have two files that represent two different states of our project and thus contain similar data in the same format (e.g. both point ...
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24 views

QGIS field-calculator time formating produces NULL

I'm struggling to format a QString attribute field to a DateTime or Date field. I've been trying the built in functions to_date to_time to_datetime of QGIS 3.10.14 and none of them seem to do the ...
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1answer
95 views

Docking QGIS Attribute Table always on the right instead of bottom

Is it possible to set the default dock position for the attribute table? I have a pretty long list of fields and 1-N relations to be displayed. Now I need to always drag and drop the window and I was ...
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17 views

Randomly creating a subset from a feature class having a large amount of data in it's attribute table

I have a feature class which has 135270 entries in its attribute table and I want to randomly select about 25% of this data for better visualization of the feature class on a web application. However, ...
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4answers
73 views

Numbering like values in new attribute table field using field calculator of ArcMap

I am using ArcMap 10.6. In an attribute field, I have 1000s of records. I am wondering if there is a way to use the field calculator to get this desired result: Species | Label A | 1 A | 1 D | 2 D | 2 ...
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1answer
45 views

Sort attribute table in an atlas layout with PyQGIS 3

I wrote a script that automate the production of an atlas layout with PyQGIS 3 that works well but it remains a detail I can't figure out. Each page of my atlas contains a map zoomed on a particular ...
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0answers
26 views

QGIS Hidden attributes not hidden in Relations

I have a PostGIS view, which a referencing layer for another layer for many to one relation in QGIS. I have hidden the following fields id, table_name, oid of the postgis view so that the user would ...
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15 views

Custom Attribute Display Pop-up (hyperlink converting “/' to ”%2F")

I have created a custom attribute display links in an ArcGIS Online webmap that include a field from my ArcGIS Server Feature Service attribute table (using attribute-based URL parameters). I am ...
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1answer
36 views

Selecting a feature in an attribute table using keyboard cursor with QGIS 3

How to select feature (row) in QGIS 3 attribute table using keyboard cursor? I can't find a hotkey for this. Is this even possible?
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1answer
29 views

How to merge rows in the attribute table while adding up one column

I intersected two layers and now I would like to merge the rows that have the same id while adding up the last column using QGIS.
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26 views

QGIS Export Vector Shapefile attribute table metadata

In QGIS, I am looking for a way to export shapefile "attribute table metadata" (data about the the data, i.e. Id, Name, Alias, Type, Type Name, Length, Precision, Comment) not the shapefile ...
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1answer
115 views

Calculating proportion of area covered by another layer - not just the intersection

This is a follow up question from $area gives NULL for some polygons in QGIS's Field Calculator and $area is NULL for over-wrapping geometry. I have a map of Cambodia at district level (dist) and ...
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1answer
66 views

$area is NULL for over-wrapping geometry

This question follows from $area gives NULL for some polygons in QGIS's Field Calculator. New question asks the same question as to why some area variables appear NULL. But the problem was resolved ...
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1answer
212 views

$area gives NULL for some polygons in QGIS's Field Calculator

I have the map of Cambodia(map) and the economic land concessions(elc). In trying to find the proportion of district covered by land concesions, I need the area variable. But when I create the ...
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2answers
61 views

Matching data attributes between records of different layers

I'd like to know how I can match data attributes between records of different layers, in which there are the same fields, in one shot. For example, i'd like to transfer data from "test_1" ...
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1answer
27 views

Delete fields from a table based on Mean calculation using ArcPy

I have an attribute table with 100 columns (values are float and not NULL; more than 3000 rows). Using ArcGIS 10.6 I want to calculate the mean value of every field in a shapefile separately (like ...
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1answer
48 views

Add an expression to calculate an attribute in the print composer with PyQGIS

In the print composer, it's possible to add an expression in the window "select attributes", in order to display an attribute that wasn't calculated in the attribute table of a layer, see an ...
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1answer
60 views

Changing fields name of an attribute table in a layout with PyQGIS 3

I have an attribute table in my layout, defined as follow : layout = QgsPrintLayout(project) layout.initializeDefaults() QgsProject.instance().layoutManager().addLayout(layout) pdf = QgsProject....
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1answer
52 views

Defining a cell style of an attribute table in a layout using PyQGIS 3

I have an attribute table in my layout, defined as follow : layout = QgsPrintLayout(project) layout.initializeDefaults() QgsProject.instance().layoutManager().addLayout(layout) pdf = QgsProject....
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28 views

Losing attribute table when working remotely [duplicate]

Because of the pandemic my work is strictly remote. I remote into my work computer via laptop. I have two monitors connected to that laptop. Sometimes when I move the ArcMap desktop program from one ...
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3answers
128 views

Joining/merging rows by attribute

I have a beautiful grid/polygon, each square having its own "ID", and several observations for each square. But, I have three categories of observation, each with its own row, matching the ...
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1answer
113 views

Connecting points with lines and saving starting and ending points in new layer

I have 3 points in one layer as shown in the first image. I am trying to connect a building points with junction point by 2 lines. For demo, I have manually drawn a lines in image 2. Here, I am trying ...
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0answers
32 views

Understanding the output of “Table Compare” in ArcMap

I'm running ArcGIS Desktop 10.5.1 on Windows 10. I tried using the "Table Compare" tool to compare the attribute table of an old version of a shapefile with a the attribute table of a newer ...
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1answer
35 views

Data of attribute table is not showing on ArcMap

I have downloaded a point shapefile and when I can add this in my ArcMap 10.4. But the problem is when I try to open the attribute table it says this message and end up with bank rows. It shows the ...
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2answers
45 views

Follow-up query on “QGIS expression for label text to display vertex coordinates of polygons”

Just a follow-up query about the existing thread QGIS expression for label text to display vertex coordinates of polygons. Is there an expression in QGIS to collect all the coordinates from the ...
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2answers
78 views

Exporting layers to different sheets of an Excel file

I have two memory layers that I would like to write their attribute tables to the same Excel file but in different sheets. So far, I've managed to write the attribute tables to separate files using ...
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1answer
41 views

Using arcpy.da.SearchCursor to sort field in attribute table by ascending order

I am using ArcMap 10.6 with Python 2.7.14 with ArcPy. I want to sort a field named Seq_ID in my attribute table by ascending order using ArcPy. I believe I have to use arcpy.da.SearchCursor. Here is ...
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1answer
105 views

Converting string column to datetime column in QGIS

I have an attribute column that has a string datetime and I want to convert that to a date column. I first attempted to simply add the time column in an expression, and I only got the year/month/date, ...
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3answers
202 views

Allocating point attributes as default values for line layer

I want to add points "ID" attribute as a default value for a line created between two points, for line layer fields "start_point" and "stop_point".
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0answers
30 views

Using python to do a calculation on a set of numbers in a text field separated by commas [duplicate]

Using ArcGIS ArcMap 10.6: I have a text field in an attribute table that has comma separated values (example: 12,24, 64, 87,29 OR 13, 45, 32,21,34, 45). For this example, I will name this field VALUES....
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1answer
62 views

Editing attribute cell data/text in “edit” mode using QGIS

I am using QGIS3.4. I turn my layer on "edit" mode. I want to type text into a blank cell or paste text. I don't know why it will not allow me to enter anything while the layer is in "...
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2answers
123 views

Replacing characters using an expression in QGIS

What regular expression can I use to change values in a string field? I need to change the letter B to a symbol - before the digits, and digits with letter F to make positive. Like this:
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0answers
36 views

How to get differentiate between stacked parcel shapefile and general parcel shapefile? [closed]

I am totally new to this domain. I would like to detect stacked parcel shapefile and mapped respective data or outlines created to all stacked parcels. In a general case where only one parcel on land ...
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1answer
26 views

QGIS Saving selected features with wrong data attribute column names [duplicate]

Following the thread here: Creating new layer from selection in QGIS? I did a great job, extracting my items from the layer by type and saving them as the separate layer. Unfortunately the problem is ...
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2answers
53 views

Adding text field to attribute table

I am trying to add a text field to my attribute table in ArcMap, but every time I do it adds a string type field instead.I've tried turning off the Allow Null Values and shortening the Length, but no ...
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1answer
35 views

Saving Starting / Ending points of connecting line in attribute table

I have 3 layers ( 1 line and 2 points) as shown in image. The layer id,s are mixture of integers and text such as cable4389175, node1 , service_point5316. I connect the two point layers (node and ...
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1answer
70 views

Removing fields in an exported table using ArcPy [closed]

I am using ArcGIS Desktop 10.6: ArcMap 10.6. ArcPy script within a custom toolbox. At the end of my script, I want to export the attribute table of a File Geodatabase Feature Class into a .csv file, ...
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1answer
44 views

Python scripting (update cursor, extract previous row values)

I am new to Python scripting. I would like to use SearchCursor to iterate in each row using the FID as index. Then I would like to evaluate length based on the following conditions: If the length >...
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0answers
16 views

How to average # of parks per child within 1 sq mile and average parks per child in whole county?

I have a shapefile of census tracts within Cook County, IL that has been combined with a shapefile of every park in the cook county area. It displays as a graduated color scheme of number of parks per ...
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1answer
49 views

Modifying the TIFF's attribute table value with R

I use raster::raster("test.tiff", RAT = T) to read the file with the format of TIFF. The TIFF is derived from ArcGIS pro generating using Feature to Raster -> raster -> tiff. ArcGIS ...
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1answer
42 views

Is there a way to sort the QGIS attribute table by date modified?

I was wondering if there was a way to sort the attribute table in QGIS Pi by date modified. I have been digitizing a large area and I need to delete the last 50-100 features that were digitized. My ...
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0answers
35 views

QField - Get attribute from selected feature

My objective is to get a automatic layout with QFIELD based on a selected object (in QField) and with some attributes of the selected object. The project works fine on QGIS but it seems that the ...

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