In GIS, Fields, also known as attributes, contain information about features.

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11
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2answers
256 views

How to sort by multiple fields at the same time?

Is it possible to sort multiple fields at the same time in QGIS? For example, I'd like to sort a table by state name, and then within each state, sort by county name. This would be the same as the ...
8
votes
5answers
308 views

Print out the properties of the attribute table in qgis?

I have to merge a lot of shapefiles into one great shapefile. So I want to compare the properties of the attribute tables to see if there are differences between the tableproperties of each shape ...
6
votes
2answers
578 views

How to specify fields to export from QGIS?

I'm using QGIS 2.0.1 and am connected to a MS SQL Server spatially enabled database (not ESRI). I am able to connect to the layer and load it into my TOC just fine. I have hidden a number of fields ...
4
votes
2answers
870 views

Choosing Shapefile attribute data type to use?

I am trying to figure out when to use (in the Data Type of SHAPEFILE PROPERTIES) - TEXT - SHORT-INTEG - LONG-INTEG - FLOAT AND DOUBLE. I am using ArcView 9.3 and I know when it is all text or use ...
4
votes
4answers
3k views

How to Change Field Name in ArcGIS 10.2

Can someone please let me know how I can change the field names (not the alias) in ArcGIS 10.2. I already found this page on ArcGIS support: "Renaming shapefile fields (Defense Mapping)" but there is ...
4
votes
1answer
287 views

How to check if feature class or table contains field with specific name before adding it?

Im trying to write a script that finds out if the shapefile has a specific field and if not to add the field. I get it to show me the field, but the loop goes through each field, so it would create a ...
4
votes
2answers
173 views

ArcMap: Calculate Quarter using Date field

I am using ArcMap 10.0 and making a map where I symbolize on annual quarter (i.e. Q1 2013, Q2 2013, and so on by quarter through 2015). If a date field contains this: 01/15/2013, and I wanted to ...
4
votes
1answer
38 views

Adding GUID field with ArcObjects

I'm trying to add a GUID field programmatically to an existing FeatureClass using ArcObjects. Here is my code: ISchemaLock schemaLock = (ISchemaLock)ipFC; try { // A try block is necessary, as ...
3
votes
5answers
4k views

Renaming a field using arcpy

What I need to do: rename a field name of a table/feature class copy all values to the new field So far I have done following code as artwork21 suggests: EDIT: import sys import traceback import ...
3
votes
1answer
896 views

How to retain Field Name / Alias on Export of Table?

Is there a way I can modify the Field Name or to make him keep the Alias when a table is exported? Or is there a way to keep the Alias instead of the Field Name, when exporting for example to .dbf ? ...
3
votes
2answers
162 views

How to set NULL as default value for a date field in QGIS 2.4?

In QGIS 2.4, i am unable to set the default value as NULL if i have not updated any value on date fields. Its automatically taking the current system date. I am expecting to set the default ...
3
votes
1answer
234 views

How to change the field value of a Shapefile using GDAL/OGR?

I am trying to change the field value of a shapefile. However it doesn't change the value. What's wrong with my code? import ogr driver = ogr.GetDriverByName('ESRI Shapefile') fn = 'dist.shp' ...
3
votes
1answer
894 views

Why does Field Calculator return 0 values when decimals are expected?

I realize I posed this question, and got answers, several days ago (see (Field calculator error)) , but none seem to really be working, and so am posing again. Below are two screenshots that show the ...
3
votes
1answer
47 views

Crosstable two fields of a pointfile (ArcMap)

I'd like to produce a simple crosstabulation from two fields of a point feature class. These fields contain land use class information which I'd like to compare. One option is to export a dbf and do ...
3
votes
1answer
37 views

Changing Visible Field Properties on Multiple Layers at once

I am pretty new to all of this and I apologize that I don't know all the correct verbiage. I am using ArcGIS 10.0 I have a map with a layer dealing with electrical primary circuits, that I split ...
3
votes
3answers
556 views

Field format lost when exporting events layer to shapefile - long field type converted to double

I have a MS Access 2010 database with about 80 000 records in it. It is point data for animal locations. I would like to bring this into GIS and project the data into lambert conformal conic. I am ...
3
votes
2answers
86 views

How to add iteration in model to join fields from several shapefiles into final one?

I have one grid (Atl1x1.shp) to which I need to add 9 Fields from 9 different shapefiles which are also grids (that is, 1 column from each shp, all with the same name). These shapefiles have the same ...
3
votes
1answer
64 views

How do I add a field to a table using the QGIS graphic modeler?

I was wondering if anyone could help as I'm struggling to get anything out of the QGIS graphic modeler. For info I have no programming skills whatsoever. I need to be able to add a new field to an ...
3
votes
1answer
105 views

How can I exclude a field on a table from being copied?

I have a query "layer": >>> r = arcpy.MakeQueryLayer_management(r'C:\path\to\connection\file\connection.sde', 'TEST', 'SELECT T.ID AS OBJECTID, T.* FROM MY_TABLE T WHERE T.SOME_COLUMN = 1', ...
2
votes
2answers
912 views

rename feature layer fields

Guys and gals could you please provide me with a sample code as to how to rename a field name in a Feature Layer or Table. I've been trying to use the FieldInfo object to do so over the last couple ...
2
votes
1answer
79 views

Using the UpdateCursor to change the values in fields added with arcpy.Addfield_management

I am working with some ArcGIS data and trying to add fields using AddField_management. >>> arcpy.AddField_management("huc4","Class","TEXT") I want to populate this new field using the ...
2
votes
1answer
193 views

How to copy values from field to another using arcpy?

Can some one please let me know how I can do simple field calculation like Copying From "A" to "B" in ArcPy? I have found lots os example on web which they all used extra expression and they were ...
2
votes
2answers
64 views

How to travers fields of records without introducing them all in the function?

In my previous question I wanted to reach a field in the field calculation; however, it was pretty easy to introduce a few more inputs for that function. Now, I am facing a problem which needs around ...
2
votes
1answer
527 views

How to create a date field in QGIS shapefile

When I create a new shapefile in QGIS, I'm presented with the "New Vector Layer" window, where I specify the Shapefile type (Point/Line/Polygon) and am then able to create attribute fields. I'm only ...
2
votes
1answer
125 views

How to hide all fields at once in QGIS 1.7

Is there a way to hide all the fields at once in QGIS 1.7? I see where I can hide one field at a time but I would like a button which does it all at once.
2
votes
1answer
31 views

Atributing fields in arcmap and excel

How do I populate a field in ArcMap (and Excel) with only a specific part of another field's attributes? For example: I want to populate the LATDEG field with only the degree part of a latitudinal ...
2
votes
1answer
53 views

QGIS: Expression WHEN property1 = 'FOO' THEN property2 = 'BAR'

Our Foundation is adding additional properties to points. If property1 = FOO , then add property2 = BAR WHEN property1 = 'FOO' THEN property2 = 'BAR' END When I run this the ...
2
votes
1answer
81 views

Python scripting for making rings from the city center

Problem description: I have two layers: 1) [Polygon] city blocks, and 2) [Point] the city center. The City blocks layer has 110,681 records. And The city center layer has just one record because ...
2
votes
0answers
60 views

Exporting spatialite view to shapefile from QGIS modifies the original data types

We have a spatialite .sqlite database where we have views which are nicely rendered by QGis, with all the symbols and everything!! There are integer fields on the view which are based on fields of ...
2
votes
0answers
60 views

QGIS 2.4.0 Chugiak “reduced” real-type numbers. Precision problem? Bug?

I have a SHP point file created from CSV with QGIS 2.4.0 Chugiak. It contains some data on noise in a certain point. When I import from CSV, it seems to be fine, but when I export to SHP and open the ...
2
votes
0answers
45 views

Why is ArcMap deleting data from a field when I add a new one?

My copy of ArcMap 10 is acting pretty strangely. I have a shapefile and all I've done is added a new field as a FLOAT and for some reason all data in another one of my fields is being deleted! Does ...
1
vote
2answers
81 views

How to Invert Deleting multiple fields with delete tool in ArcGIS 10.1 SP1

I have a feature (polygon) with nearly 60 fields in it. Now I want to delete all fields except 20(or a list of) and they are not one after one, no they are somewhere in the droplist. But to select for ...
1
vote
1answer
57 views

Field's name with numbers: why not?

I have tried to create field in TOC called with numbers with python. But, it has a problem: it couldn't do it because name's of fields are numbers. It is strange for me. When I do new field in shape ...
1
vote
1answer
324 views

What might cause “ERROR 000728: Field <fieldName> does not exist within table” in this code?

I have seen ERROR 000728 several times and I could never figure out why it happens. Here is a snippet from my code: str_Dissolve = arcpy.Dissolve_management(Intersect_str, ...
1
vote
1answer
196 views

Updating the value of a field with pre-defined values

I am trying change the value of a row for a field whose type is "short" in arcmap using a python script. with arcpy.da.UpdateCursor(FILENAME, FIELD) as cursor: for row in cursor: row = ...
1
vote
2answers
882 views

How to delete multiple fields in an attribute table?

Is there a way to select multiple fields in an attribute table and delete them together in Arcmap without writing the script?
1
vote
1answer
45 views

Postgres/PostGIS: Dissolve multiple fields with COUNT (Point shape)

I have loaded point .shp feature classes into Postgres 9.3 db, and enabled postgis,plpgsql,postgis_topology extensions. I'm looking to dissolve multiple fields within a single table 'TABLE1' and add ...
1
vote
1answer
44 views

*Value relation* widget in QGIS

I cannot understand what the Value Relation widget of the Fields menu in QGIS actually does. For example: I have a point layer with some columns (ID, value1...) and a table (so just a dbf file) with ...
1
vote
1answer
32 views

How to derive Z-score values for a given field

I have a shapefile with an attribute field with a range of numerical values. I would like to derive z-score values for this field within ArcGIS. Any tips?
1
vote
1answer
56 views

Create and immediately update field using Field Calculator

You can create fields and once created, populate them with data using the Field Calculator. But can you do both at the same time using an expression? Or must you do it in 2 steps?
1
vote
2answers
191 views

How to add a new column in attribute table with attribute with indexes of another max-min ordered attribute field?

I've an attribute column named e.g. VALUE with different values I would like to make a column named e.g. ORDERsuch that the greatest value has the attribute 1 the second value 2 etc. etc. so order ...
1
vote
1answer
166 views

Cursor Update Python Script for Multiplying Several Fields against a Ratio (Real) in ArcGis

Disclaimer: Python Neophyte, Uber-reliant on GUI, working to wean... I have a Python script for replacing multiple Field values with another table value that was graciously provided by the inimitable ...
1
vote
1answer
84 views

How do I change the isNullable property for a field?

Once in awhile I encounter a field in my featureclasses that have their isNullable property set to No. Is there a simple way using python to correct this? I came up with this code, but ...
1
vote
1answer
118 views

Adding, Updating, and Deleting information from arcGIS Server

I am new to ESRI and GIS. I am starting to get into using client data. I have created maps and put them to the server using arcMap and arcGIS for Server. I need to know how easily I can access these ...
1
vote
1answer
26 views

How to count the number of fields in a table using arcpy?

arcpy contains a ListFields method, which "Lists the fields in a feature class, shapefile, or table in a specified dataset". The resulting object has a count method, but I can't see how to return the ...
1
vote
1answer
40 views

How to add a new column into an attribute table in ArcGIS Online?

Is it possible to add a new column in the attribute table using the ArcGIS Online version or do I have to return to my home computer and do this through QGIS? A little background to help better ...
1
vote
1answer
45 views

Why does this python OGR code for creating a layer and then adding a field not work?

Spot the difference! So this works... fp = "C:\\LiDAR\\MyLayer.shp" layer = "MyLayer" driver = ogr.GetDriverByName("ESRI Shapefile") data_source = driver.CreateDataSource(fp) srs = ...
1
vote
2answers
37 views

finding the index of a field with its name using arcpy

I wan to extract the index of a field with its name using arcpy. it seems what I have written is so dumb. is there any simpler method with out using for-loop. import arcpy fieldList = ...
1
vote
1answer
39 views

Arcmap: a different delimiter when symbolizing “Unique values, many”?

In Arcmap 10.1, is it possible to use something other than a comma to separate the value fields when symbolizing by "Unique values, many"?
1
vote
1answer
39 views

Expression to create and populate column based on filtered fields

I wanted to create a column and populate it with data based on data from other fields. If column_1 contains fields which has similar string (eg. field_1 = "Country: UK", field_2 = "Country: US", ...