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

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3
votes
0answers
46 views

Adjacent DEM files have narrow triangular gaps when joined

Newbie here. I've downloaded several DEM files from GeoCommunity which correspond to adjacent regions. When I join them together to form a larger relief map there are triangular 'gaps' on all four ...
0
votes
1answer
49 views

How to use classified styles with joined layers?

I am trying to set a color range based on this tutorial In LAYER PROPERTIES for "new", in JOINS, I have joinlayer - data-join joinfield - GEO_ID2 targetfield - GEOID10 Where "new" is my shapefile ...
1
vote
0answers
70 views

Join field from table to a raster layer

I'm trying to join a field in a table to a raster layer. I'm using the tool 'Join Field'. The table is in a excel sheet, but have been imported to a file geodatabase. The table has an ObjectID field ...
4
votes
1answer
189 views

How do “join field” and “target field” work?

New user. This should be simple, but I can't figure out how to perform this basic join in QGIS. (It works in Cartographica.) My shapefile (IL_BNDY_County_Py) has two fields/columns in its attribute ...
0
votes
0answers
57 views

Adding a new attribute to shapefile from Excel sheet [duplicate]

I have a shapefile in QGIS and I needed to add a attribute to the attribute table. The problem is that I have the information I need to add in an Excel file. How can I add the information from the ...
1
vote
4answers
644 views

Why does QGIS not detect the CSV/DBF column headers?

I am trying to import a csv or dbf into qGIS so I can perform a join on a shapefile. However, qGIS is not detecting the first row as header names. I know I've done similar joins before and there's ...
2
votes
2answers
2k views

Creating non-spatial Many to One Joins/Relationships between tables

I may have missed a trick here but I can't seem to find a solution. I have a table of ~1.6 million postcodes, also containing co-ordinates, and a separate file detailing ~6000 a population with ...
4
votes
3answers
2k views

How to join two tables using date, time, lat and lon as common field?

I am sorry if the question is elementary but I did not find any clear discussion or guide to understand how to run a query in postgresql. So that a pointer to another website would be also useful. ...
3
votes
0answers
773 views

How to join data from a CSV to a shapefile using QGIS

I'm new to GIS and new to StackedExchange. I need help joining a CSV of Accessibility data to a LSOA shapefile in QGIS. The process explained here does not work for me and I don't know why. The ...
2
votes
2answers
2k views

ArcGIS Geoprocessing: Join multiple fields to a table and export new table as join field name

I am bit new to geoprocessing and ModelBuilder. I am using join field tool to join table (info tables/.dbf) to one a shape file. I am trying to use ModelBuilder, as there are around 100 tables (each ...
0
votes
0answers
167 views

MS Access join table values, not recognized by ArcGIS symbology

I joined a MS Access database table to a GIS file. When I try to use symbology (categories) to represent a yes/no value which is in the table file (0/-1) it does not recognize it as a value.
1
vote
1answer
368 views

arcpy JoinField_managment RuntimeError

So, I've been banging my head against the wall the last few days trying to figure out what's wrong with my script. It's suppose to pull weekly flu data from a department of health website, parse it ...
1
vote
2answers
221 views

How to join a File Geodatabase table with only one record of Feature Class

I've a Geodatabase containing a Featureclass and some File Geodatabase Tables. Each File Geodatabase Table is actully about the only one record of a featurClass. Can We Join these File Geodatabase ...
7
votes
4answers
3k views

How to close multipart polyline gaps in ArcMap

I have a multiple multipart contour lines that originally came from CAD drawing. I converted these into a polyline shapefile in ArcGIS. The issue I have is with gap in each contour lines that are ...
6
votes
2answers
3k views

Joining tables without losing original field names in ArcGIS for Desktop?

I'm wondering if there is any method to preserve the original field names in ArcGIS when I join csv. tables to a Shapefile. I ask, because sometimes I join tables with 10, 20 or even more columns ...
4
votes
1answer
539 views

How to join fields which must still be created in ArcGIS Model Builder?

I am in the process of creating a generic model in ArcGIS Model Builder. At one point in my model, I have to do a join between an existing layer (entry parameter) and a table issued from the "Zonal ...
4
votes
1answer
258 views

Join a table to a parcel layer and get duplicate parcels, reflecting individual leases

I have a table of 3,000+ lease files that I'm trying to join to our parcel layer. Each parcel has 4+ leases associated with it, and I need each to be represented by an actual polygon. When I do a ...
2
votes
1answer
302 views

joining a table from zonal statistics as table with a layer, problem with reserved names

I have a raster file (percentage of total forest killed) and a shapefile with polygons (municipalities). I thought as a first step I would like to find out which municipality shows the greatest ...
5
votes
1answer
601 views

How to use a search cursor on a joined table in ArcMap?

I'm struggling to get a search cursor to work on a joined table view. I've used search cursors before, but never on data that has been joined. Arcpy keeps saying that some of my joined fields don't ...
3
votes
2answers
93 views

How can i spatially add text to feature in argis 10?

I have alot of text that write with drawing tools and same feature . i want to find a method to add texts to features spatially like spatial join for feature to feature . is there any method to add ...
1
vote
2answers
1k views

One Polygon Joining to Database with Many matching records

Using ArcMap 10.1. Is this possible to have one polygon and join to a database/excel with many matching records? I would like to have 1 polygon but match to 100 corresponding records in a table. When ...
1
vote
1answer
782 views

How to merge different classes/clusters in one single raster in arcgis 9.3?

I've created a signature file with 8 clusters and performed an unsupervised classification. Later I have grouped values (spatial) classes together to form 4 classes I needed (in symbology) but that ...
1
vote
0answers
309 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
1k 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 ...
3
votes
2answers
558 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 ...
2
votes
2answers
377 views

Joining lines in MapInfo that won't be split by disaggregate?

I have just run a disaggregation a .tab containing just lines and found I have a few with duplicate IDs. However when I zoom in these lines appear to be connected. Is there any way to join these ...
1
vote
0answers
438 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
746 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 ...
1
vote
4answers
4k views

Merging multiple .tab files?

I was wondering if there was a quick way to merge multiple .tab files together? I have about 100. Would appending one tab to another with the MapBasic window open, then changing the name of the table ...
0
votes
0answers
454 views

How to do a spatial join if QGIS 1.8 keeps crashing?

I am trying to perform a simple spatial join (adding polygon data to points) in QGIS 1.8: target vector: points join vector: polygons take attributes of first located feature keep all records ...
-1
votes
6answers
419 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/ ...
4
votes
3answers
4k 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
534 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
325 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 ...
5
votes
1answer
403 views

How do I avoid text field truncation when saving a table join?

Using QGIS I've joined tabular text data (all in fields of less than 255 characters) to a shapefile via a CSV file. All looks good in the joined table but when I save to a new shapefile to make the ...
8
votes
2answers
1k views

Trouble with graduated symbols after joining shapefile with csv file

I have successfully joined data from a csv file to a shapefile in QGIS but for some reason I am having trouble symbolizing my data. I want to use a graduated symbology however this option is not ...
2
votes
3answers
600 views

vector tool missing when install QGIS 1.7.4 on new computer

I installed QGIS version 1.7.4 a few months ago. Under the menu Vector > Data Management Tools I have two options to make a join: 'Join Attributes' and 'Join attributes by location' (see screenshot). ...
4
votes
1answer
605 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
555 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 ...
1
vote
0answers
784 views

arcpy spatial join input parameter problems [closed]

Using ArcGIS 10 SP4 with all extensions... I have a parent directory (J:\...\spatialjoin) containing two sub-directories of feature classes I want to spatially join. Directory 1 (target features) ...
5
votes
3answers
2k 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
791 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 ...
6
votes
1answer
825 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 ...
8
votes
1answer
2k 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 ...
1
vote
1answer
524 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. ...
1
vote
0answers
50 views

GeoJoin with ArcGIS Services [closed]

Has anyone seen any ways to dynamically join data in services. E.g. I've already exposed County boundaries in a MapService, now I want to let users join their relative data to this service for their ...
2
votes
3answers
776 views

How to join a WFS layer to a stand-alone table in OpenLayers

I'm a complete novice at OpenLayers, and am checking whether the following is possible. I envisage a dataset of polygons in GeoServer, being served as a WFS layer into OpenLayers. The polygons won't ...
1
vote
1answer
776 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 ...
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 ...
5
votes
1answer
692 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 ...