To join the attributes from one spatial data layer to another

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Help with “Combine” tool in ArcGIS

I have two raster layers. Layer A has a cell size of 1020 m. There are 31,840 rows in the attribute table, each corresponding to a different 1020 m x 1020m cell. Layer B has a cell size of 30 m. The ...
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63 views

Copy parts from several attribute tables in shapefiles?

I have several shapefiles from which I wish to take parts from their attributes tables to make a new attributes table. Is this possible without destroying the original attributes table? I have ...
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1answer
49 views

Joining a table with thousands of transactions to one point (location) in Arc Map

I have a large transaction data set in the millions and around a 100 positional points. I need to join the transaction data set to these points. Arc map won't let me join them without errors or if it ...
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2answers
96 views

Extremely slow processing time to map lat/lon data onto census shapefile with ArcPy?

I am a newcomer to ArcGIS and Python so I would greatly appreciate any and all input on this issue. What I am trying to do is very simple: map 400K business locations using lat/lon coordinates onto a ...
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76 views

pyQGIS (Spatial Join): Sum features of attribute from point layer and join with vector layer

I am new to Python and QGIS. I have avoided asking questions up to now. But by now I have developed a reasonable idea of where i want to go so and where I am stuck. So, I have decided to ask but sorry ...
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1answer
68 views

How to do spatial join which is also based on time using ArcGIS for Desktop?

I have a time series plot of house sales for 4 years, but in those 4 years some districts change. I was wondering if I need to split the data into 4 layers for each year in order to join them to their ...
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2answers
98 views

Create line between polygon and nearest raster cell

I need to create a line between polygons (centroid) and the nearest cell of a raster dataset. The polygon and raster do not intersect. Each polygon has a UID. One cell can be linked to many polygons, ...
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54 views

Trouble intersecting a polyline and contours (Hack index / stream length gradient index)

Working on creating polylines for measurement using SL index (hack index). So far I have the main trunk of a stream, and contours at 10m. What I am trying to do is a) get the elevation at each ...
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322 views

Arcpy Spatial Join Running Extremely Slow [closed]

I have a simple arcpy script that runs a series of spatial joins. However, the script is running extremely slow: one set of joins takes over 12 hours. There are a few for loops, but I have timed these ...
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116 views

Calculate values to represent bus route attribute

I'm working with bus routes and looking for a way to represent some values in this system. I want each street to be represented by thickness based on value returned in SUM or COUNT. I don't have big ...
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103 views

How to display labels from many-to-many relationship in ArcGIS 10 using VB.NET?

I have two tables in a geodatabase: parcel; and person 1 or + parcel, can have 1 or + person (relationship is many-to-many) Using VB.NET I can display all the parcel labelled with the ...
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93 views

Summing time spent on effort from point GPS data tracks in grid cells

I have one layer of point data representing GPS tracks collected during vessel surveys (an individual survey is indicated as the time between departing and returning to shore and there can be more ...
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358 views

How to transfer the attributes of features based on their spatial relationship?

I'd like to check if a point feature class is placed on a line feature using python in ArcGIS 10.0. I have created a set of point features and placed them directly on a group of line features at ...
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22 views

How to perform a join on simultaneous spatial and attribute criteria in PostGIS [duplicate]

Possible Duplicate: How to perform a join on simultaneous spatial and attribute criteria in ArcGIS? I have two point layers and want to perform a spatial join on nearest distance. I have a ...
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2answers
119 views

duplicate polygons once for each point inside

I have a set of feature classes: points representing addresses, and polygons representing buildings. Sometimes there are more than one addresses per building. I use Maplex to generate and place ...
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2answers
283 views

Spatially join polygons (target) to polylines (join) on longest intersecting polyline

I am curious if I can, without having to write a python or an ArcObjects script, create a spatial join that will result in a polygon feature class containing the attributes of the LONGEST intersecting ...
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1answer
65 views

Find polygons that contain a specific number of points

I want to make a polygon selection based on a specific number of points. For example, I want to select those polygons that contain more than 30 points. I don't want to select every polygon that ...
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1answer
54 views

Export data of points and polygons which are intersected

I have a shp file of roughly 100 Polygon. I also have a corresponding list (including X,Y data) of about 3000 points, in a csv file. Overlayed within QGis the 100 polygons contain about 90% of the ...
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1answer
64 views

Assigning vector data attributes from other adjacent data

I am supposed to do a presentation on how to do this, and I'm not exactly sure what it is asking. The question is: "how can you assign vector data attributes from other adjacent data?" I am in a ...
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1answer
52 views

Display county for random points

I have a county level shape file for South Carolina. I generated random points using Vector->Research Tools-> Random Points. The Attribute tables for the random points layer has only the ID included. ...
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1answer
66 views

Merging attributes from parcels within a census tract

I am working with land parcel data and Arcmap 10.1. Each land parcel has a code (1,2,3,4) depending on the type of water supply source that it uses. I am trying to take a tally of each code within ...
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1answer
65 views

using joinDelimiter with MergeRule “Join” (Python in ArcGIS 10.1)

In this example from ESRI, the MergeRule is set to "Mean" and the values from two fields from two different feature classes are averaged and written to a new field. # Set the merge rule to mean ...
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922 views

How to Join Attributes by Location in QGIS 1.8.0

I have a points layer with site attributes and a polygon layer with region attributes. I'd like to join the names of the regions to the point site locations using QGIS 1.8.0., on Windows XP. ...
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1answer
92 views

SpatialJoin with “closest” option ok in python script but not when in arcmap toolbox

I have the following problem. I want to create a toolbox to obtain the distance between a polygon (Bldg.shp) and a point (pts.shp). I have started with a simple following python script: import arcpy ...
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1answer
45 views

Using Spatial join tool returning “Count” values in Model Builder in ArcGIS10

I want to replicate the manual Spatial join (R-click Join) using 'count' in Model Builder. I have 2 datasets: Historic Road Traffic Collisions (RTC) locations - Point feature (gdb) - 3,398 rows ...
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1answer
27 views

Joining rainfall data to point features using ArcPy?

I have 180 point feature classes with rainfall totals. Each feature class represents one days rainfall for a region and has around 36K points (think of each point as a weather station in the region). ...
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43 views

Spatial Join Points and Polygons

Hoping someone can help me out. I am trying to create a grid road map with an index table for street look up. I am using this tutorial by ESRI: ...
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29 views

Wrong line segments are being matched by Spatial Join in ArcPy?

I'm working on an analysis in which I want to compare 2 polyline-datasets. In one of the first steps, I use a spatial join to create a sub-dataset with only those line segments that have an exact ...
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66 views

Needing a python script to spatially join points to line segments with merge rules and a frequency count

I have a data that contains 4 years of fatal crash point incidents. Within the data set there is a field for the "Death Count" and "DWI Related," where death count is the number of deaths resulting ...
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1answer
64 views

How to add point attributes to containing polygon?

I have three layers in a QGIS project: layer 1 is a boundary layer of polygons each with and id I will call "p_id" layer 2 is a point layer each with an id called "p_id" layer 3 is a .csv layer ...
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45 views

Truncate operation not working in ModelBuilder?

I'm having trouble with a model that is supposed to truncate data from the attribute table of a feature class (which is in a file geodatabase not ArcSDE) and then append it with new data. The ...
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1answer
49 views

Summing the number of intersections with a separate buffer layer

I have dabbled with ArcGIS and QGIS a bit, and I consider myself a self-taught beginner with a whole lot to learn. So, I have two layers: 1) census blocks, and 2) point data. My goal is to calculate ...
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35 views

Consult the charts of a line

I have a table of bus lines and other bus stops in PostGIS. Are conformed to the image below, the lines and the stops on the sides. I want to relate the lines with parades through a spatial query. ...
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64 views

How to create a many to one spatial join?

I have a polygon feature class of territories and a point feature class of trees. The points have many attributes, one of them is the tree species name. I need to get the list of all the tree species ...
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28 views

Joining by location - DIVA-GIS .dbf layer not included

I want to get place names from a .dbf file displayed on my map. I've imported the .dbf file as a vector layer. The gazetteer table does not have any ID fields so I was trying to use the "Join by ...
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1answer
99 views

Qgis Spatial Join: problem with a column!

I run the function "Join attributes by location" in Qgis 2.2 between a point vector layer and a polygon vector layer. When I open the resulting table of contents of point layer there is a column of ...
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1answer
45 views

QGis polygon to points different CRS problems

I'm trying to join the values from polygons onto a grid of points. I had this problem solved here by @Underdark , however a few layers weren't working. It seemed they were all British National Grid ...
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29 views

QGIS Spatial join many points to single vector [duplicate]

I've got two shape files, one contains many point coordinates and the other vector shapes. There are many point coordinates contained within each vector shape. I would like to perform a spatial join ...
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1answer
50 views

Using attributes of a polygon in one layer to identify polygons in another

So I'm in the process of developing a web application, I am using open source tools so qgis, postgis, play framework for the web app. And I have come across an interesting problem that I'm trying to ...
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2answers
88 views

Python Error in QGIS Ubuntu 13.10 while trying to join .csv tables

Using the mqgis plugging in QGIS I cant join my csv file... This is what QGIS returns me: An error has occured while executing Python code: Traceback (most recent call last): File ...
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1answer
106 views

Visualizing information when click in polygonā€¸ - Spatial join

I am new to cartodb, right now I am trying to do something similar to the cartodb tutorial: Create your first map with CartoDB.js, but with polygons using my own map. For example: I did a spatial ...
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61 views

Pyscripter hangs on spatial join?

I've got a script which loops through a series of FC layers (tracker points). Using a FOR loop, they're reprojected then joined to a streets layer. Sometimes it works fine, then other times it never ...
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33 views

How to assigning multiple values (for single field) to a polygon layer [duplicate]

I am using arcmap 10 to generate a dataset that represents apartment building stock within particular suburbs. I have point data for the apartment buildings, with fields for the number of dwellings ...
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102 views

trying to make a point to polygon attribute join with a many to many match

I am trying to match US charter schools to noncharter schools in QGIS. I have constructed a buffer of 10 miles around each charter schools and then tried a join attributes by location match with non ...