To join the attributes from one spatial data layer to another

learn more… | top users | synonyms

0
votes
0answers
95 views

Is there a faster alternative to arcpy spatial join?

I am wondering if there is a more efficient method than using arcpy spatial join in python. I am currently using intersect and closest methods (including a near distance field) so would need ...
3
votes
3answers
125 views

Spatial join without operation on the variable of interest

I have a simple problem: I've got to spatially join records of an epidemic in forests to some plot coordinates I have gathered. Problem is, I cannot obtain the records for each year on each plot, I ...
0
votes
2answers
79 views

Spatial join with snapping

is there a tool in QGIS which is able to perform a spatial join with the possibility of define a snapping radius? For better understanding: I have 2 point shapes with attributes I need to join by ...
1
vote
1answer
90 views

Extract polygon attributes from covering polygon with highest area

I have a fishnet grid (polygon layer) and another polygon layer containing some hexagons. I would like for each square polygon in the fishnet layer that covers a hexagon (even a tiny edge of it) to ...
3
votes
1answer
37 views

How many A features that fall both in the B polygons and C polygons are for each C polygon?

I have this apparently complex problem for solving in ArcGIS: Practically, I need to get the number of all yellow polygons that fall within both the green polygons and the red polygons. I need this ...
0
votes
1answer
230 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 ...
0
votes
1answer
44 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). ...
0
votes
0answers
122 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: ...
1
vote
0answers
96 views

Spatially join points to polygons in ArcGIS Desktop? [duplicate]

I am trying to join a point feature class to a gridded polygon feature class in arcGIS so that all the points are matched to the grid cell that they fall within. I would like to end up with an ...
1
vote
0answers
60 views

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 ...
2
votes
0answers
103 views

CRS problem: not recognizing the CRS of shapefiles to be the same for all

I'm attempting to aggregate (average) the attributes a point layer to polygon attributes (i.e. block groups and counties) via a spatial join. Both the points and polygons are in the same projection - ...
2
votes
1answer
119 views

Update Attribute based on spatial location

I want to spatially (Spatial Join) update few fields, not all, from another feature class. Is there any way to select and update few fields instead of all the fields from the other layer and ...
0
votes
0answers
56 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 ...
2
votes
2answers
328 views

Join CSV file to shapefile

I wanted to join a CSV file to a shapefile. When I identified a field to facilitate the join, e.g., map <- spChFIDs(map, as.character(map$ID)) it returned Error in spChFIDs(SP, x) : ...
5
votes
2answers
79 views

How to select random adjacent census tract

I have set of census tracts spaced out across a city and I would like to randomly choose an adjacent census tract to explore nearby demographic data. I'm not sure if there is an easy process for ...
1
vote
1answer
187 views

Adding attributes to line feature according to adjacent polygon

I'm trying to add attributes to a field in a polylines attribute table according to directly adjacent polygons.... In the pic, the purple line has an empty field labelled 'FG' and I'd like to fill ...
2
votes
2answers
119 views

How do I select Census Block Groups inside a Zip code?

Long time listener, first time caller. I already have my data imported, problem is my SELECT statements aren't yielding the results I'm looking for. I specifically need all the Block Group ...
1
vote
0answers
73 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 ...
1
vote
1answer
60 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 ...
1
vote
0answers
49 views

Tagging polygons within larger polygons (spatial join)

another QGIS newbie here. I have a number of smaller polygons which perfectly aggregate to a larger polygon. I want to "tag" the smaller polygons with the ID of the larger polygon they make up. ...
1
vote
1answer
116 views

Join Attributes by Location: .mdb and shapefile in QGIS

I can join attributes by location in QGIS using 2 shapefiles. However, I do not know how to do the join when one of my files is in a .mdb format while the other is a shapefile.
1
vote
2answers
255 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 ...
0
votes
1answer
181 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 ...
1
vote
0answers
143 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 ...
1
vote
1answer
389 views

Counting unique occurrences during Spatial Join?

I have a point shapefile (points.shp) with fields [owner], [name], etc.. [owner] and [name] are both of type string. The owner contains a single string, the unique owner. Name contains a list of ...
2
votes
1answer
77 views

arcpy: join feature class (one to one) and get feature id of each joined object

I am currently spatial joining two feature classes like this arcpy.SpatialJoin_analysis(target_features,join_features,output_features, join_operation="JOIN_ONE_TO_ONE", ...
0
votes
1answer
84 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 ...
1
vote
3answers
1k views

More Efficient Spatial join in Python without QGIS, ArcGIS, PostGIS, etc

I'm attempting to do a spatial join much like the example here: Is there a python option to "join attributes by location"?. However, that approach seems really inefficient / slow. Even ...
0
votes
0answers
107 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 ...
0
votes
0answers
15 views

about spatial joining and getting area of attribute from each subgrid [duplicate]

I have grids of 3 x 3 sq km, i.e., 9 sq kms which I want to divide into 4 subgrids. I have already done so. I neach grid of 9 sq kms, I have digitised land cover types from Google Earth and so in the ...
0
votes
1answer
80 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 ...
0
votes
1answer
76 views

Can anybody help me with Spatial Join in ArcGIS 10? [closed]

I have a doubt, I do not find what's happening. Screenshot: Using the Join (Join data from another layer based on spatial location) I have done an Spatial Join by location, and it is said that the ...
2
votes
1answer
140 views

How to implement 1:n joins with string attribute concatenation?

I have a question concerning pyQGIS. I'm a QGIS long-time (self-learned) user, but just a pyQGIS newbie. I want to implement 1:n spatial join with attribute concatenation in the table. I have a vector ...
0
votes
1answer
60 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 ...
2
votes
1answer
204 views

Is there a work-around for a completely_within spatial join in ArcGIS? This is bugged (confirmation by Esri Inc)

I tried to perform a 1-to-many spatial join between polygons (target feature) and lines (join features) to join the lines that are completely covered by a polygon to that polygon. (the polygon is ...
0
votes
0answers
81 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 ...
1
vote
1answer
164 views

ArcGIS spatial join - WITHIN A DISTANCE including distance

I am applying a spatial join in ArcGIS between points (target features) and lines (join features). I want to have a 1-to-many join, so I use the match option 'within a distance'. So far so good. The ...
0
votes
1answer
128 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 ...
1
vote
1answer
95 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 ...
1
vote
1answer
109 views

How to maintain Shape_Length field afer Spatial Join of Point to Polyline feature classes?

I need to get for each point the length of the line that joining to the point. How to maintain the "Shape_Length" field of polylines when I'm Spatially Joining point to lines feature classes ? When ...
0
votes
2answers
662 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 ...
3
votes
1answer
281 views

how to create a network from gps tracks?

I'm trying to build a network from several GPS-trakcs, to digitalize hiking routes on my land. I have several GPX-files from routes I've tracked with the gps. I managed to display them in Arcmap ...
0
votes
1answer
55 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 ...
1
vote
2answers
171 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 ...
2
votes
1answer
221 views

Is there a limit to the amount of data in a spatial join in QGIS?

I am using Quantum GIS and trying to spatially join a point grid with polygons that are overlapping. If I get the sum of intersecting features, then I can get a good raster value. Well, every time I ...
0
votes
0answers
34 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 ...
2
votes
2answers
209 views

ArcMap's Join and symbology

I'm still new into the GIS World, and here's what i'm trying to achieve , i have Yemen administrative shapfile with list of governments, and districts,i also have an excel file with a list of migrants ...
1
vote
1answer
944 views

How to spatially join polygon fields onto a point layer in QGIS?

I have gridded depth points in CSV format that I'm trying to add other map data to, in additional columns. I've tried joining fields, hoping that I could link the Shapefile data to the csv, but when I ...
1
vote
2answers
158 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, ...
1
vote
0answers
73 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 ...