A tabular set of data linked one-to-one to a set of spatial features.
4
votes
2answers
1k views
How to add automate values to attribute field?
I have parcel, Buildings layers, without any information attribute table, and i want to replace "NULL" values with numbers form 1 to 2000, in "Parcel ID", or "Building ID" field
thank you.
5
votes
3answers
3k views
How to change a CSV layer attribute value from text to number?
I read in a CSV file for linking to a .shp file. All the variables that are just numbers came in as text. How do I change the text variables to numeric in QGIS?
3
votes
1answer
342 views
How to force ArcGIS to recognize a text field in a CSV file?
Related to Data-type detection in ArcGIS table loading
I have a CSV file which contains a mixture of numeric and text fields:
ID,Txt,Int,Dbl
12345,abc,45,56.78
12346,9,65,23.12
12347,10,66,23.13
...
3
votes
1answer
342 views
Can I access a raster attribute table in QGIS?
I have some Python code that makes Raster Attribute Tables for GeoTiffs using GDAL. In ArcGIS I can see these attribute tables fine and they behave how I like (as classifications). But in QGIS the ...
2
votes
1answer
117 views
find polygon corner coordinates
I am trying to get the coordinates of each node of the polygon I create. I would like the attribute table to display the name of the polygon (ex. address) and then the coordinates of the nodes (ex. ...
4
votes
1answer
1k views
Feature Layer Attribute table to Datatable and make it editable
Hi Currently i'm using this to turn it into a data table
featureCursor = layer.FeatureClass.Search(que, false);
row = featureCursor.NextFeature();
if (row != ...
5
votes
2answers
632 views
How to select features with NULL attributes in QGIS?
I need to identify which features have null attributes in the attribute table of a shapefile. When i try [field]= 'NULL' it selects the features with value=0 (see picture)
Suggestions?
2
votes
1answer
696 views
Adding fields to raster attribute table
I have a raster attribute table associated with an IMAGINE .img raster that I build and open with:
IGPUtilities utils = new GPUtilities();
IRasterDatasetEdit2 raster = (IRasterDatasetEdit2)
...
5
votes
3answers
428 views
How to determine the centroid of polygons?
I have a polygon vector and I want to quickly attain the centroid of this polygon for insertion in a text document. I am working with QGIS. I searched through other questions and although some are ...
5
votes
1answer
371 views
How to fill my column with consecutive numbers
I m very new to Qgis, so forgive this simple question.
Searching in older topics didn t help either.So:
I make a new column in my attribute table and it has a default value(for example 0).
I want to ...
5
votes
3answers
937 views
Is there an ArcGIS tool equivalent to “Dissolve” that can be used on tables?
I have a data table that I need to trim down, merging records which have the same value in an ID field and performing a couple math operations on various other fields (summing, averaging). The ...
5
votes
3answers
719 views
ArcGIS 10 attribute table sort issue
what is the solution for this funky sorting Esri does in attribute tables with decimal places values... screen shot: http://i.imgur.com/0fqvF.png attribute table funky sort
4
votes
5answers
362 views
Can a new point automatically be populated with data from the containing polygon
I need some help to create a script.
Imagine that I'm using 3 shapes: 1 point and 2 polygons. When I create a new point I want it to assume some attributes of the polygons in which that point is ...
3
votes
2answers
93 views
Total of attribute field of point layer per polygon layer
I have a polygon shapefile of many lakes, I also have a point shapefile of locations on those lakes where fish were caught.
The point shapefile contains the attributes:
Fisherman_iD, Fish_Caught, ...
1
vote
2answers
600 views
Adding a new field in ArcMap from data of an existing field
I want to create a new field with years data. There is an existing field with the timestamp YYYYMMDDHHMM. But I just want the years from that field to the new field. That way I can display just the ...
1
vote
3answers
249 views
Select by Attribute --Top 500 values selection in attribute table - ArcGis
Is there any way we can select top 500 values in attribute table?
I tried by sorting area field ascending/descending... but I can't count big numbers to select.
In microsoft excell we can do know, ...
1
vote
3answers
535 views
ArcGIS problem accessing fields attribute table
I encounter a strange problem. I have a simple shape file to which I added some fields and then populated them.
Now I wanna access those fields from a script to run some buffer operations. I wanna ...
