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

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32 views

QGIS feature subsets are incompatible with table joins. Bug?

When using QGIS 2.8.2, I am unable join a table to a layer that has a feature subset (Layer Properties > General > Feature Subset). For example, creating a feature subset on a layer prior to joining ...
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1answer
61 views

Working w/ Shapefiles Containing 50,000 to 300,000 Features

I work daily with shapefiles that are quite large in number of features using ArcGIS. Sometimes I am able to perform operations (joins, selections, exports, etc) on these shapefiles (though they do ...
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37 views

What is corrupting my layer file?

I'm trying to save layer files from a colleague's mxd. As usual I right clicked on the layer and saved as layer file. Simple - but no - the layer files can't be opened. I get this message "Adding ...
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2answers
38 views

QGIS joins 2 FIELDS

I. a new to GIS and mapping. Using QGIS. Have an excel with 4 columns (Region; District; village; number of cases) Have a shapefile with dots for villages with many columns including (Region ; ...
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1answer
41 views

How to conduct an inner join with QGIS?

My QGIS (2.8.2) joins always result in an outer join. How do I create an inner join with QGIS?
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1answer
31 views

Problems when joining large shapefiles to excel table

I began with a shapefile of 330,000 features, each having already been geocoded (not that it matters I don't think). I attempted to join this shapefile to an excel spreadsheet but of course, Arc ...
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11 views

Export Joined table an Feature layer based on a query

I have a table and a layer joined fine, I am trying to export the end result into a file geodatabase, the export is fine if I specify specific name, other than that it exports the original layer data. ...
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1answer
14 views

Join line segments sharing a common attribute, using GDAL

I'm having trouble rendering a shapefile consisting of trail routes broken down into many short segments. So I'd like to combine them into a small number of line features, which share a NAME and touch ...
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17 views

csvsql SQLite --insert causes ID to change

I have a question that stems from a solution provided in this Question: Join a CSV file to shapefile using gdal/ogr? I've been using this to do joins successfully but for some reason, I have a field ...
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28 views

Why aren't my hyperlinks saving in ArcGIS 10.2

I have a polygon layer and I have a joined table with a link to an excel document for each polygon. Under the "Display" tab in layer properties I check the "Support Hyperlinks using field:" box and ...
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1answer
44 views

MapInfo SQL: Selecting all columns from one table, some cols from second table?

I'm fairly adept with the SQL Select in MapInfo, but I'm running into something that's got me a bit stumped. I've got data in two tables that have a few columns in common. I want to join the tables ...
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23 views

Problem in “Add Join” function in modelbuilder

I'm having an error when I run the model in Add Join (3). Add Join (2) runs well, but when it's running Add Join (3) it fails with Error 999999. I think it's because it already runned Add Join (2) and ...
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20 views

Adding values from a text file to a gridded area on my map [duplicate]

I have a .txt file with comma seperated values. Each individual value corresponds to a cell in my grid. The first value in the .txt file corresponds to the cell in the first column and first row of my ...
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1answer
36 views

Joining Parcel/Building Attributes Based on Coordinates

GIS noob here: I downloaded a building footprint shape file for a city and imported it as a vector layer in QGIS. I was hoping to see street address information in the attribute table, but there was ...
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1answer
45 views

Adding data from a table to a grid in ArcGIS

I have a table with 720 rows and 156 columns. I have a grid with 720 rows and 156 columns. I would like to assign the values from the table to the corresponding values in the grid. I am a beginner to ...
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16 views

Join based on approximate area

I am trying to join information from a table to information from a feature class based on "approximate area". I have drawn (on-the-fly) building footprints, multiple footprints per parcel. I have ...
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2answers
29 views

Spatial Join returning max value and unique ID

Using ArcGIS 10.3 I have a dataset containing polylines of a pipe network, along which I have a polygon layer representing a burst every 50m. The burst layer contains a value (p) and a unique ID (the ...
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32 views

google earth xml export

i would like to ask a question that pertains to exporting xml to be used in a google earth .kml file. my map incorporates daily specials for local businesses. i am joining two tables to accomplish ...
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1answer
26 views

why the values are NULL if I join the csv table to a point shp file [closed]

So my problem is all values are NULL if I join my csv-table to a point-shape-file. (QGIS) Why? I tried so much thing but I can not find and handle the problem. I have customer names in the csv, ...
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1answer
36 views

Exporting KML from QGIS with relation (one-to-many) table as popup

Here is a challenging one for someone. I have two tables in QGIS. Holes (parent) - Which contains the borehole locations. Strata (child) - which has many rows that contain the strata for each ...
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32 views

Multiple LEFT JOIN in PostgreSQL

I got a "nice" problem with a query in PostgreSQL with a multiple join SELECT DISTINCT "Monitoraggio_L001_L008_2015_aprile"."ID", "Monitoraggio_L001_L008_2015_aprile"."Ordine", ...
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2answers
45 views

What is the strategy to add attributes to shapefile when the number of records are not the same?

I'm trying to add attributes (in excel format) to an existing shapefile using ArcGIS, but the number of records between the two are not the same; there are some records in one file but not in the ...
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39 views

Joining shapefiles based on FID in QGIS [closed]

I want to join shapefiles (or a shapefile and a data file) based on their mutual FIDs and can't see the FID in the "Target Field" dropdown on the join form. I believe this is a basic need to have ...
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1answer
53 views

Write CSV table for join self in ArcGIS for Desktop?

I wonder how I would write a table for a join which I want to perform. Right now I wrote a .txt File, tab-seperated. The headerline only contains letters. Here is the problematic table: ...
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4answers
62 views

Create Statewide Hydrologic Soil Group Map

This may be better for Engineering? Not sure. Background: Previously I have downloaded SSURGO soil data for the state of Pennsylvania by downloading each county and merging the shapefiles. I then ...
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41 views

Joining the tables with the geometry

I have a large table (as a shapefile without geometry, just set of records) with data which has the refference to the other tables (as a shapefiles with specific geometry, reference as same ID's for ...
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1answer
33 views

How to take only relevant rows from database, based on common codes

I have a shp file that is missing some data, e.g. attributes. I have the missing data in a csv file. How can I get ONLY the relevant rows from the csv file added to the current shp file's data table? ...
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2answers
62 views

Combining spatially identical polylines in the same layer

I have a shapefile of road volumes as polylines, and want to be able to show the sum of the volumes for polylines that are spatially the same/similar but are for travel in opposite directions. For ...
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1answer
76 views

Joining blank shp with dBASE Table

What is the best way to join following tables? I have 55 records in the second table and I would like to just "drag and drop" the data to the first one. Shapefile table Database table
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39 views

QGIS table join with multiple fields

I am trying to join info from a DBF to a shapefile. There isn't a perfectly unique identifer. Is there a way to join the tables with 2 or 3 fields? The simpler the better. I am just getting familiar ...
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0answers
32 views

Can I define a style for one layer, taking into account a defined relationship with another? (QGIS 2.8)

I have two sets of data. A large set of lines with a line_ref field, and a small data-only (no geometry) table with a matching line_ref field (let's say for argument's sake that the data-only table ...
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2answers
77 views

add attribute information from polyline to a point shapefile (QGIS or ArcGIS)

I was wondering if, and how, it is possible to add attribute information from a polyline to a point dataset. I have a network layer with information per street how many scooters went over this street. ...
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1answer
80 views

CartoDB table join error: Column reference is ambiguous

I've got a CartoDB question that seems dumb b/c the layer is correctly rendering. Anyway, I have two layers, named sampling_points sample_point I'm trying to inner join the sample_point data to ...
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1answer
43 views

QGIS Categorized Symbology based on joined table

I am trying to create categorized symbology for a data layer. The column that I would like to base the categories on is a result of a table join. For some reason it isn't working. All of my polygons ...
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84 views

How do I join multiple features with a single geometry-less table entry?

I have three features with the same ID, let's say "5". I also have a corresponding text table containing IDs among other info (for example a "category" value). I want to join the table with the ...
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1answer
43 views

Update the_geom field with polygons from a different table using one common field

Using CartoDB SQL API I'd like to: Update the_geom field in a table that has no spatial data by selecting the polygons from a table with spatial data and joining based on one common field.. In this ...
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37 views

Using the QGIS Graphical Modeller how can I choose specific fields to make a join based on?

I wish to join one field from a shapefile to another shapefile within the QGIS graphical modeler. I am aware that there is a 'Join attributes table' algorithm but this joins all of the fields from the ...
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2answers
154 views

PostgreSQL/PostGIS Geom to JSON with Inner Join to another table

I am currently producing JSON from a database successfully using the following query: SELECT row_to_json(fc) FROM ( SELECT 'FeatureCollection' As type, array_to_json(array_agg(f)) As features FROM ...
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150 views

How to find soil names for “mukey” in USDA Soil Data SSURGO

I an trying to join the soil descriptions in the tabular data to the spatial data in ArcGIS. I have both the mukey and musym in the attribute table associated with my soil polygon layer in my map. ...
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1answer
44 views

Point inside st_dwithin with wrong results

I want to get all points, that are in the same area. Therefore, I have the following query for my table check: SELECT l.location_id, l.location FROM check l INNER JOIN check l2 ON ST_DWithin ...
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1answer
37 views

Joining Information from Point and Polygon

I tried to find the answer to this question by searching, but I was not too successful. My issue is that I have a point file of around 400 Organizations that do not have a column of county names tied ...
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3answers
86 views

Field Join by Approximate Data in ArcMap?

I've run into a bit of an issue. I recently pulled data from the CDC website concerning Suicide rates by county. However, the csv file does not have locational data. Luckily, my project is about the ...
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24 views

How to show an overview of all Joins and Relations in ArcMap Project?

Is it possible to get an overview of all Joins and Relations between my Tables and Files in ArcMap 10.1? Right now I have to right-click on every file to see how it is connected to another file. It ...
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2answers
354 views

can't join excel(2013) to ARCGIS 10.2.2

When trying to join Excel datafile to shapefile in ARC GIS 10.2.2 I keep getting the following message: "Failed to connect to database. An underlying database error occurred. Class not registerd." ...
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2answers
66 views

Performing batch Join Field in ModelBuilder?

I have a list of 250 feature classes (X1, X2 X3, ...) which all have an individual field that I want to join to another feature class Y. The join can be established through a common field that are ...
3
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1answer
46 views

Joined tables and now field calulator is greyed out

In ArcMap (10.2), I accidentally calculated the wrong field outside of an edit session, so there was no way to reverse my action. I restored a previous version (shadow copy) and joined the tables ...
2
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1answer
41 views

Can I join a table with a field with several rows with the same word to a polygon?

I have a table that looks like: Name X X X Y Y Z Z I have a polygon feature class with the attributes: Place X Y Z Essentially, I want to join that table to the polygon, but I want each row in ...
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106 views

Joining to data in ArcGIS Online

I'm a GIS professional. One of my clients (an ArcMap user) has asked our firm to teach some of his staff about ArcGIS online. In so doing, we are to provide an overview of GIS-- how to think ...
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2answers
211 views

Join table field with shapefile programatically (via PyQgis)?

The following is currently unsuccessful at fulfilling a table field join to a point shapefile in Qgis. All instances of the join object will print the proper values, and no error is flagged when ...
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1answer
89 views

Creating many-to-many table from intersection between two polygon layers in QGIS?

I have created a buffer around several points. I want to intersect this layer with a Census Tract layer. My end goal is to create a table that would list all the census tracts that intersect with the ...