Questions tagged [spatial-join]

To join the attributes from one spatial data layer to another using their common location

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Polygon to polygon spatial join without double counting join features using ArcGIS Desktop

I am a new GIS user trying to aggregate local ward-level voting data up to a broader county-level using a Spatial Join. Generally a given ward is within only one county, so a JOIN_ONE_TO_ONE for the ...
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25 views

Finding point from Layer B that matches point from Layer A using search radius

I have two point shapefiles of trees from two different surveys. I want to verify if data from Survey A matches data from Survey B. I want to create a search radius of 10m around each tree from ...
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17 views

R- Quickest/most efficient way to parallelize/break up an overlay of points to large grid (or spatial join)? [closed]

I have a shapefile of roughly 200,000 randomly spaced points that I need to overlay with a grid to find which specific cells the points fall within (will aggregate/average the points up later). This ...
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11 views

Adding results of Spatial Join to ArcGIS Online feature

As an example, I have 2 feature classes: Houses (points), which is uploaded online on AGOL Streets (lines), local layer I want to give every house a street name. Here is what I do: Do a spatial ...
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26 views

Spatial join with polygon and multipolygon mixed feature class

I have a feature class which contains 300,000 polygon and multipolygon features in the same fc. The goal is to get a result layer of spatial join (must to be one to many join) between this feature ...
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41 views

Sliver polygons, vertex, gaps

I'm correcting a Land Use polygon, interpreting a drone image using QGIS. When I use the cut tool and merge tool to edit, the polygon leave a smalls polygons like a line, or sometimes leave a vertex ...
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20 views

How to add up election zone voting upto county level?

Sorry if it is a trivial question. I am trying to add voting data from election zone up to county-level using spatial join tool, but I cannot figure out which relationship I should use. When I use ...
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25 views

Spatial Join in QGIS and update column

I have a layer of lines and another layer of polygons. I would like to update the lines with the unique reference of the polygon they are within. I am able to complete the spatial process of ...
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1answer
117 views

TypeError: cannot unpack non-iterable NoneType object on Spatial Join

I'm working with two spatial dataframes and am trying to do a spatial join on the two. parcels_sdf -- a frame with around ~370,000 real estate parcels. subdivisions_sdf -- a frame with all ...
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1answer
34 views

Spatial join based on by location and by attribute

I have tried to solve my problem using previous similar issues but I didn't find anything. I want to get direction for a shp (shapefile) with routes (polylines) and then to join this information in ...
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1answer
41 views

Choosing one certain point (out of many) for nearby polygon based on coordinates and other similar attributes

I am working on a project in which I have to find a certain lightning strike that caused an area to burn. For now, I have 1300 fire areas with approx. 27,000 lightning strikes in my QGIS project map. ...
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1answer
54 views

Copying fields from one attribute table to another in QGIS

I have two layers. One is point, the other one a line. They both share same x and y coordinate. How do I transfer one field from the point layer to another field in the line layer based on the same ...
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1answer
72 views

Line and polygon intersection in GeoPandas/Python

I am trying to intersect two GeoPandas data frames, the first one is the street data (streets) and the second one is a buffer (polygon) around a point (buffer). I want to find the intersection of ...
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12 views

Proportionally distributing attributes from one layer to another

I have some experience with ArcMap but only on a relatively superficial level. Right now, I'm trying to perform an action and I'm not sure to get it done. I've tried Googling and documentation but I'm ...
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3answers
81 views

Concatenate string field in spatial join in QGIS

I'm doing a spatial join between a point layer and a polygon layer. The point layer has a field called "type" which has string values. When I join this to the polygon layer, I would like to get a ...
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1answer
45 views

Calculating percentage of area by district of land use type

I have a file geodatabase feature class, type polygon, of land use type. SEQ LU Update X project clip in the attached. I have a districts shapefile (shapefile feature class polygon). All_Brisbane in ...
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1answer
53 views

QGIS and ArcGIS Pro give different results on spatial join

I have two point layers that one has 2885 and the other has same 2885 plus 1748 more features. The second one is a result of "v.net.centrality" analysis and now I want to join the result spatially ...
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1answer
29 views

ValueError geopandas.sjoin: why does it not read my GeoDataFrame?

I'm working on a spatial join between a polygon from a shapefile and points from a CSV file, using geopandas.sjoin. I want to assign each point with a name of the province it is located in. I do know ...
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49 views

Creating table of point in polygon results using PostGIS

I have one PostGIS table of polygons like this: index | lat | lon | geom where geom is a polygon d-type ex. POLYGON ((x1,y1,x2,y2.....)) CREATE TABLE buildings2 ( index integer PRIMARY KEY, ...
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1answer
38 views

Error message when joining two dataframes with sf -Error: y should be a data.frame; for spatial joins, use st_join

In R, I'm trying to count the number of points which fall within a buffer around polygons and add the count result to the original shapefile from which the polygon file was created. I've followed the ...
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1answer
51 views

Merging and adding values based on ID column?

I have two shapefiles: a grid containing just the grid "ID" column a shapefile containing multiple entries from different road segments The second shapefile represents emissions with a common grid "...
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1answer
39 views

Match by location and attribute in QGIS?

I have 2 different layers. One layer is the field layer which contains field agronomic data, name, variety, etc. The other layer is a layer with about 2000 polygons. Each polygon is tied to a ...
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39 views

Spatial join for adjacent polygons with same attributes

I am working with QGIS 3.4.5. I have a map of soil types (~ 100.000 polygons) and I'm trying to find the best way to make a spatial join with ~5000 point features with several numerical ...
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39 views

Plotting point data from one dataset on polygon

I have a point dataset with information on: date, number of beneficiaries, and type of assistance. I want to plot/map this info on a country polygon. I tried joining attributes by location, but that ...
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41 views

QGIS Join attribute by most similar lines

Using QGIS 3's (new?) Join attributes by nearest feature on two multiline layers, I get unexpected results... Namely, if a line crosses another, that is favored over one that is almost exactly the ...
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Join fields QGIS processing framework [duplicate]

Using QGIS 3.4.12-Madeira I'm building a model using the algorithm 'Join attributes by location'. In my operation i want to join several fields from a layer, but not all. I tried to set one field ...
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30 views

Keep properties after spatial join

I have two Feature collections: One that includes the location of dams and one that provides the basin area of a river within a country. I want to use gee to obtain a list of dams constructed in a ...
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1answer
48 views

Table join or virtual layer to match multiple points to geometry

I have: a non-spatial table of multiple test results with reference to non-unique locations, and a spatial layer that has all the locations (multiple results per location) I can do table joins ...
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37 views

Iterating spatial join with multiple merge rules (and then creating raster) in ModelBuilder?

I'm using a Basic licence in ArcGIS Desktop 10.3 with Spatial & 3D Analyst extensions. I have a dbf file which contains point data for several days. I want my final output to be a) a point ...
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1answer
56 views

QGIS equivalent of ArcMap spatial join - share a line segment with

I have two polylines shapefiles that I wish to join together spatially. One is a road network and the other consists of bus routes which I have calculated the frequency over a certain period of time. ...
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1answer
32 views

Find which line has the highest Z value of a set of lines intersecting a polygon

I've a dataset of polygons representing buildings and a dataset of polylines representing buildings. The dataset with lines has a Z value for each line, the polygon dataset doesn't. There are several ...
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1answer
31 views

Summing Points in Buffers using ArcMap

I have created a buffer layer and I have a points layer. How do I count how many points lie in each buffer using ArcMap? I have been using a spatial join and I know I should probably use the Sum ...
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4answers
154 views

Find the maximum value for a point among several overlapping vector layers in QGIS3

Dataset 1: around 80 vectorlayers with polygons. Each polygon has a value for a noise measurement. Some of the layers (up to ten at at time) are intersecting at some locations. Dataset 2: a ...
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41 views

Spatial join not assigning IDs correctly in QGIS [closed]

I'm using some of the spatial join functions (join attributes by location) to assign points to a polygon grid (that was created in QGIS using spatial tools --> create grid), but it's assigning ...
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1answer
48 views

Aggregating multiple rasters within a polygon in PostGIS

I have several raster tables in PostGIS (four in fact but in this case let us assume there are just two) - same cell sizes, same alignment but with different types of value (e.g 3d_pot, 3d_area). ...
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24 views

Merge attributes using spatial join where Target and Join feature is the same

I have a single polyline feature class and i need to merge one of the attributes together based on a common identifier using a delimiter (i.e. |). I was certain Spatial Join using the one feature ...
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27 views

Iteratively join linestrings that intersect?

I'm struggling to iteratively join intersecting linestrings of a geometry collection using st_join, meaning I want to join intersecting linestrings, but want to build on that join (i.e. joining all ...
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2answers
336 views

Joining attributes from points to lines QGIS

I am working with two shapefile layers: lines and points. These shapefiles do not overlap and have different attribute values. The point layer contains data that I want to join to the beginning and ...
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1answer
17 views

What is getting nearest points between two different but nearby (almost intersecting) datasets called?

I need some terminology help as I am still learning GIS. This is related to, but not the same as, What is getting nearest points between two different but overlaping datasets called? I have two ...
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1answer
32 views

What is getting nearest points between two different but overlaping datasets called?

I need some terminology help as I am still learning GIS. I have two datasets. One with the address of every fire and it's latitude/longitude of small census tract. One with the location of every ...
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1answer
31 views

Using join in ArcGIS Pro?

I am trying to join the information from a line to that of a point associated with that point. To explain a bit, it would be adding the information from a bus line to the associated bus stops with ...
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0answers
64 views

GeoPandas spatial join generates error in QGIS 3.8 Python console

I want to execute a spatial join using GeoPandas in the Python console QGIS 3.8 like this: dfsjoin = gpd.sjoin(point, polygon) but it doesn't work. It always shows the following error: Exception ...
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1answer
75 views

Optimising Large Spatial Queries in SQL

I'm sure similar answers have been given elsewhere but no matter what I have tried I am unable to optimise this query. Details: TableA has 3.5mill records TableB Had 57000 records but I have ...
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2answers
74 views

GeoPandas sjoin with extensive quantities

I have one geodataframe that contains polygons and corresponding land use category (e.g. agricultural, commercial, retail, residential, ...) and another that contains census tract polygons and ...
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1answer
87 views

Spatial 1 to 1 join by proximity in sf and R?

I'm trying to join a Simple Feature of POINT geometry type to another Simple Feature of POLYGON geometry type using st_join and nngeo::st_nn as the person asking this other question also did. The ...
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29 views

Extracting list of counties that are nested within larger geographic units in QGIS?

I have one layer/shapefile that consists of county boundaries and another layer of larger geographic divisions that each contain about 15 counties. I basically want a list of all the counties that are ...
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2answers
118 views

Spatial join based on polygon centroid in QGIS

I have 2 cleaned shapefiles, one containing building footprints and one land parcel shapes, both have attributes. I want to do a spatial join when data from the land parcel is merged into the ...
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1answer
36 views

Spatial Join Polygon to Polygon with Centroids Inside features

I have a parcel feature class with +5M features. I want to spatially join it to a feature class of regions to check if the regional code matches that in the parcel data. I've tried using "have their ...
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1answer
71 views

Multiprocess Spatial Join with Spatial Index

I'm a newbie in implementing GIS on Python, but the lack of any GIS software at the office has forced me to learn about it. I have a huge grid (a multipolygon) that I'm currently filling out with ...
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1answer
76 views

QGIS: Joining data from multiple road lines onto polygons by location

I'm looking to add traffic data linked to a polyline shapefile of road centerlines to a multipolygon shapefile of land parcels. I want to join this data using proximity to roads instead of by matching ...