The process of connecting two or more datasets based on a common attribute or spatial location.

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5
votes
2answers
1k views

Creating polygons from a one to many relationship of points

I have a set of polygons that are in a one to many relationship with points. The polygons are administrative boundaries and the points have information on companies and percentage of ownership . I ...
18
votes
4answers
9k views

Joining non-spatial CSV file to spatial data (shapefile) using QGIS?

I have a CSV file which has postcode data in a field, but it is non-spatial e.g. no Easting and Northing. I have a shapefile with postcode in a field and some additional data. I want to join the ...
13
votes
1answer
2k views

Why do simple joins on small datasets slow down ArcMap so badly?

ArcGIS 9.3.1, ArcInfo. I have some small file geodatabase and SDE featureclasses (few thousand records each, 50 columns) that I am doing attribute joins on. After the joins, drawing of the map is ...
5
votes
3answers
943 views

SDE views not showing values in joined table

I created an SDE view between a point feature class and a table (stored in SDE) - the join is done on a text field called RFRNC. I changed the view so that it is now a LEFT OUTER JOIN in line with ...
2
votes
2answers
471 views

Join Issue with Attributes Table

I am trying to Join a Mineral Database (excel) into my Attributes table. Once I do and check the Attributes, it shows up as "NULL". What is causing that, what am I not doing? Can anyone offer ...