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

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1answer
55 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, ...
0
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1answer
51 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 ...
0
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0answers
184 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
56 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 ...
1
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0answers
96 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 ...
0
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1answer
66 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: ...
4
votes
1answer
927 views

Most efficient method to join multiple fields in ArcGIS

I have as set of shapefiles with approximately 300000 polygons each, as well as corresponding point shapefiles and tables with approximately the same number of row (equal or less rows than the ...
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0answers
77 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 ...
4
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2answers
1k views

Join a CSV file to shapefile using gdal/ogr?

I have a shapefile with several attributes, for example YEAR, COUNTY, and AREA. I also have a CSV file with more fields that I want in the shapefile, such as POPULATION. Both the shapefile and the CSV ...
0
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1answer
36 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? ...
1
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2answers
69 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 ...
0
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1answer
108 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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3answers
7k views

Creating join based on multiple fields using ArcGIS Desktop?

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 ...
2
votes
1answer
54 views

How to improve join between shape and view?

I have a problem with a simple join and I don't know what to do: I have a shapefile with 400,000 parcels, in this shape I have only one column with the parcel id with an index. I have a Materialized ...
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 ...
1
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1answer
637 views

Slow performance with Add Join and Calculate Field?

I have a point layer and a table with approximately 100 fields. I need to join the table to the point layer based on a key field and create a new shapefile / feature class. This script has been ...
0
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0answers
53 views

QGIS table join with multiple fields [duplicate]

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 ...
2
votes
1answer
715 views

ArcMap many-to-many join

I'm working in ArcMap 10 and can move around in R, though am not an expert. I have a shp file and an xlsx file. The shp file is 20,221 rows and includes a field GID (grid ID) which is not unique ...
1
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0answers
44 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 ...
0
votes
2answers
171 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. ...
1
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1answer
58 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 ...
0
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1answer
338 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 ...
2
votes
2answers
309 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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0answers
122 views

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

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 ...
0
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1answer
107 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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0answers
748 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. ...
0
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1answer
90 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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2answers
164 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 ...
18
votes
4answers
7k views

How to join attributes from nearest point in QGIS?

I have two layers with points, call them A and B, each with different attributes. For each point in A I want to join all the attributes from the nearest point in B. Ideally this would also include ...
1
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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 ...
3
votes
3answers
114 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 ...
0
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0answers
32 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 ...
0
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2answers
2k 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." ...
2
votes
2answers
4k views

Join Fields from Multiple Tables to One Table in Modelbuilder

I have 40 tables with about 2000 row with a shared ID that I want to merge into 1 table with 2000 rows. I only want to retain a distance field calculated within each table. The distance field is ...
0
votes
1answer
154 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 ...
3
votes
2answers
2k views

Arcgis not seeing my column header to join tables

I am trying to join a data table to the attribute table of a shapefile. I have done all the necessary steps to makes sure it works: removed spaces, not use numbers in column headers, remove illegal ...
3
votes
1answer
395 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
votes
1answer
56 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 ...
1
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0answers
294 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 ...
3
votes
2answers
594 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 ...
6
votes
6answers
1k 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: ...
0
votes
1answer
47 views

How to join multiple lines (branches of a large stream network)

I've generated a channel/stream network based on a DEM, but each branch of the network is split into very small lines. I'd like to have the network divided into as few separate lines as possible, so ...
1
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0answers
63 views

Saving fields after a raster join with python arcgis

I am working on a raster processing script in which i join a categorical raster with a table that includes some extra data on each category. After much hassle, I have the join working, but I can't ...
1
vote
1answer
73 views

Joining dBase (*.dbf) table to Coverage?

I have a dbf table and a polygon coverage. How do I join and save the joined data to the coverage without exporting to feature class and then re-creating a coverage in python? I have been looking at ...
1
vote
1answer
113 views

Returning list of field names in joined table using ArcPy?

I need to look at all the fields in a joined table performed through arcpy. I am instigating for fields in arcpy.Listfields(Feature): print fields but it is returning a large list of: ...
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2answers
185 views

How can I release the lock file on a DBF after removing its join to a FeatureLayer using ArcObjects?

I found another post with two different answers on how to remove the join between a feature layer and a standalone table, but neither method successfully removes the lock file ...
3
votes
1answer
361 views

Using ArcPy to Remove Join?

I am trying to remove a join in arcpy and have been all over the forums and help topics but cannot get my script to remove the join. I have tried many combinations of inputs to the remove join but to ...
2
votes
1answer
110 views

The best practice to join\relate\connect 4 feature class together

What is the The best practice to join\relate\connect communities\UMP\BuiltUP\Admin boundaries, Could you please consider the following scenario: I have a feature class with a name “community “ ...
4
votes
2answers
2k views

keep the same field headers after joining a table to a shape file in QGIS

I noticed that after joining a table to a shape file the headers of each fields in the table used for the join are changed by QGIS and they are attributed to a different name. For instance, i had a ...
8
votes
1answer
185 views

Can you use wildcards for column headers in Field Calculator?

I know you can use wildcards for fields like so (in the Field Calculator): case when "column" ILIKE '%example%' then 1 else 0 end Can you do something similar for the column headers themselves? I ...