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

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1
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0answers
252 views

In ArcGis 10, spatial join of a hot street value to a fishnet cell is counting multiple values for same street segment

So, I am working on a fishnet, so that we can attribute multiple values to points within different cells (i.e., ranking light poles as optimum for traffic cameras based on the number of speeding ...
3
votes
3answers
850 views

Copy dbf data into a shapefile in Arcpy

Basically it's to perform a one-to-many join in a python script, from a dbf to a shapefile. I saw (Greg Krakow's method) using QGIS, but I can't use it (I'm working on it, but QGIS is not yet ...
5
votes
5answers
1k views

Spatial Join on two point featureclasses produces empty output featureclass

I have two point featureclasses that intersect each other. They are in the same projection and dataframe. The issue is, when I perform a Spatial Join the output point featureclass is empty. The file ...
3
votes
2answers
420 views

How to create polyline feature from two input points by following/tracing another polyline?

I have a list of things each have two grid references, start and stop points. I can turn these into points and join them with polylines. But what I need to do is have the lines that join the points ...
1
vote
0answers
333 views

Should Delete Field work in ModelBuilder while there is a Join present that appears unrelated?

I am having an issue with a very simple Model, both in ArcGIS 9.3 and ArcGIS 10.0. The part of the Model that is causing trouble is shown below, along with ModelBuilder's error message (in ArcGIS ...
2
votes
1answer
464 views

Counting occurrences across a record in ArcGIS 10.0

I'm a student at Millersville University, PA studying for a BA in Geography with a concentration in GIS. I've stumbled across this site for questions I've had over the past year or so with getting ...
10
votes
2answers
6k views

How to join external tables with a shapefile's attribute table in QGIS?

I need to join a .csv table into an attribute table of a shapefile. I wanted to do this with QGIS and i don't seem to find anyway of doing it. I know that the mmqgis plugin does it, but my shapefile ...
-1
votes
6answers
395 views

Which program that merges excel data onto shapefiles is easiest to use?

some options for merging looks like fusion tables, vizmaps, and these 2 http://mapbox.com/tilemill/docs/guides/joining-data/ ...
3
votes
1answer
2k views

ArcGIS - Create a join based on multiple fields

I have two feature classes in a File Geodatabase that I would like to join based on multiple fields. I've searched this site and Google and all I have come up with was to use the Make Query Table ...
1
vote
1answer
422 views

Joining tables with merge rules in ArcGIS

I have two tables in ArcGIS that contain a mutual unique identifier, which the join will be based upon. However, table2 has multiple records of the unique identifier. There is another field in table2 ...
2
votes
0answers
247 views

ArcObjects : How to change layers connection properties without losing joins

I'm using arcObjects 9.2.6 java librairies to change connection/path properties within a java prog. This prog aims to change path and connection properties for all layers of an mxd file. It works well ...
1
vote
1answer
440 views

Enhance performance of a join query for mapnik using postgis

I use mapnik to render map with datasources from a postgis database. One query is a join on two table, one with a geometry (a polygon) and the other one with some fields I want to use for rendering. ...
4
votes
1answer
511 views

Spatial Join in PostGIS according to Line Attribute

I am in the process of building a data warehouse in PostGIS, that will store the length of the road network of a country (Lines) per Administrative Area (i.e. Province or State, referred to as AA ...
1
vote
1answer
524 views

Join attribute table

I am using QGIS 1.7.3 on Mac and when I try to use the tool "join" in the properties toolbox, I have no possibility to add a name for either the file or the field used to join tables. Has anyone ...
5
votes
3answers
1k views

FME: Join attributes in text file with attributes in SHAPE file

I have a SHAPE file with points and different attributes - one attribute MyID. I also have a plain text file with several attributes - each in a separated column: MyID MyValue 1 A 2 B 3 C ...
1
vote
1answer
582 views

Linking SharePoint database with ArcGIS…possible?

Ok, so I the organization I am working for has a sharepoint database that multiple people update every time they do an inspection of natural resources on a parcel in the county. This database has the ...
7
votes
5answers
6k views

How to join multiple records to single feature?

apologies for what I'm guessing is a really easy problem to solve. GIS user, not programmer here. I'm trying to create a join/relate in QGIS where I have a shapefile of buildings and to that I would ...
6
votes
1answer
650 views

Can Spatial Joins be used to perform One-to-Many Closest joins?

My situation appears rather simple, but it has given me headaches more than once already. I have a set of points and a set of polylines. I would like to use a spatial join to join the attributes of ...
6
votes
1answer
1k views

How to perform a spatial join of point and polygon layers in PostGIS?

I have a point dataset representing households that I want to associate with a parcel layer (i.e. assign its parcel_id). With ArcMap, I could spatially join the polygons to the points and specify that ...
6
votes
1answer
2k views

Spatial distance join between polygon and points using R?

I'm figuring out how to do a Intersection (Spatial Join) between point and polygons from shapefiles. My idea is to get the closest points and those points that match completely inside the polygons. In ...
1
vote
1answer
572 views

How to join an external table to a set of polygons, and symbolize on the joined values, in a web map?

Say I have a table showing a number of statistics - for example, various gun crime by US State measures. I also have a dataset of state boundaries. How can I join the table to the features in a web ...
5
votes
1answer
617 views

How to merge linestrings that don't touch based on common name?

I had a table of road line strings that contained duplicate road names with different geoms for different line segments. I extracted the duplicates to another table. I now want to join these segments ...
4
votes
1answer
441 views

ArcObjects joins and non-persistent fields after joining to multiple tables

I have inherited a truly awful and very large ArcObjects project that was originally written in VB and then ported to C#. Apparently the source code I have been given is not the latest version and I ...
1
vote
2answers
573 views

Join/Relate in ArcGIS 9.3.1 ArcEditor through a python script - is it possible?

I'm working on a ArcGIS 9.3.1 ArcEditor and I want to write a python script that will do a Join or Relate. Problem is, that join table\join field are restricted to ARCINFO (higher license), and relate ...
5
votes
1answer
193 views

Reading an Existing Join

Confused again. I was finally able to run ArcCatalog and create a join in my map document (I will do the deed programmatically eventually) but I was interested in how a join looked once it was ...
3
votes
1answer
117 views

Deep merge data from multiple layers

Let me explain what I mean by "Deep Merge" and what I am trying to do. Suppose that I have 3 layers (Layer1, Layer2 and Layer3) with the same field names (field_a, field_b and field_c). For any ...
3
votes
7answers
15k views

Having problems with joining an excel table to a shapefile in ArcMap

I have a shapefile of lower layer super output areas (LSOA) for England and Wales and I have a spreadsheet of the indices of deprivation for each of the LSOA's in England. I want to join the ...
5
votes
3answers
856 views

How do I remove a join (between a standalone table and a feature layer) with ArcObjects?

I already know how to do a table join with ArcObjects, via the IDisplayTable, IMemoryRelationshipClassFactory etc. interfaces. Here are some links to resources that have example code for this: ...
4
votes
2answers
423 views

How do I correctly perform a spatial join between lines that travel along each other in ArcGIS

I have 2 layers, one representing streets, and one representing pipes. The pipe layer has a street field that I want it to be automatically filled (I want the pipe to show the street that it's on) I ...
14
votes
4answers
6k views

Join non-spatial CSV to spatial data in QGIS

I have a csv 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 csv with ...
2
votes
1answer
272 views

How to join averaged precipitation values to each municipality

I have precipitation data that I would like to average over each municipal unit in a boundary layer. First, how do I average the rainfall spatially by each administrative unit? Second, the rainfall ...
3
votes
1answer
656 views

Help with joining a large dbf file to shape file

My overall objective is to create a timeline animation depicting when a person is working in a particular region. The .dbf table consists of over 6000 record entries of shift data, including date ...
5
votes
2answers
858 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 ...
5
votes
2answers
3k views

Trouble creating a query table

I need to join one feature class and one table. This is a one to multiple join, therefore, my only option seems to be by creating a query table. My problem is that the fields I want to join do not ...
4
votes
2answers
3k views

One-To-Many Table Relate Viewed Through ArcGIS Server

I want to create a Table Relate with a one-to-many relationship between a layer and a non-spatial table based on a common field. My question is, if I publish this data to ArcGIS Server, will an ...
5
votes
3answers
878 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
454 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 ...