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Questions tagged [combine]

For questions concerning methods and best practices for combining data of different sources, resolutions, or formats to produce new information.

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14 views

Combining several layers together using Google Earth Engine?

I have executed Google Earth Engine code for filtering areas with linear regression details for a specific time period. The countries were filtered as separate layers. I need to combine those layers ...
2
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1answer
30 views

Why does fasterize gives different output for multipolygons with and without internally resolved boundaries?

I was thrilled to be clued into the package fasterize, which speeds up the rasterization process in R tremendously. However, I cannot figure out why the fasterize() function outputs two different ...
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1answer
57 views

Combining overlapping rasters in ArcGIS

I have two DSM rasters, one is 10km radius photogrammetric data, the other is 2km radius LiDAR data, both centred around the same point. I need to combine these together, essentially inserting the ...
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0answers
26 views

I want to combine or merge rasters

I am combining many rasters using a "barcode" that describes attributes for each cell. Combine works on integer values: I combine multiple layers using "combine" tool, then create the bar code by ...
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1answer
96 views

Join CSV data to a raster file in QGIS

I am trying to join three data files to a raster grid: I have environmental data in the centre of each grid cell (delimited text layer), Sightings (delimited text layer), effort points (delimited ...
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1answer
45 views

Merge/Dissolve Polygon overlapping within

I have a polygon that has been broken down to an intersecting analysis point. Each segment has its own acreage within an acre field on the attribute table. I want the intersecting lines to be removed ...
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0answers
61 views

Combine two raster maps with transparency

I have two maps in geotiff format for exactly the same area with exactly the same geoinformation. The first one is a real land map, the second one is a satellite picture with clouds (rgba where alpha ...
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0answers
70 views

.nc file flipped and rotated in qgis, no CRS, need to be able to project properly to make a masl

I have two separate files, one is my Land Surface Temperature and the other is the Grid with the lat/lon both are .nc I wanted to add my grid, which comes in as an attribute table, to my Land Surface ...
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1answer
73 views

Seamlessly combine map layers (fill the gaps of one layer using the second one)

I am creating air quality maps using two approaches. One of them gives slightly better results when validated against measurements but there are significant spatial gaps present in the output. The ...
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2answers
55 views

Return values from combining different fields

I'd like to classify parcels according to combinations of front setbacks and side setbacks. I have a "Fr_sb" field with values 0 (no front setback) and 1 (with front setback), and a "Si_sb" field with ...
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0answers
125 views

Creating raster layers, weighting them, and combining them in QGIS [closed]

I'm looking to create raster layers from vector layers, rescale them, weight them then finally combine them for a final result. I'm really not sure about the process to do this. On Arcmap it's ...
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1answer
226 views

Combining polygon and raster using ArcGIS Desktop?

How do I combine the raster data and county outline polygon so that only the elevation data within the county boundaries is displayed?
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1answer
55 views

Combining features with multiple similar field values to one and adding unique values as new fields using ArcGIS Pro?

I am using ArcGIS Pro. I have a table with several objects that are identical with the exception of one field that has several unique values. How can I merge these multiple features into one and ...
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0answers
54 views

Creating population weighted spatial join of two layers with intersecting polygons using ArcGIS Desktop?

I have data where I sampled my outcome using a grid of 1-mile radii but my explanatory variables are at the census dissemination area level. I would like to average my census dissemination area-...
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3answers
1k views

Spatial join of multiple different point layers keeping all attributes in ArcGIS

I have 28 fairly large point data sets (1/6 degree global grid), all of different extents but with the same point location (previously extracted as centroids from raster pixel). Each point layer has ...
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3answers
974 views

Counting raster values in each polygon using ArcGIS Desktop?

I have a Watershed with ~100 smaller watersheds as a shapefile. I want to count the number of different land use values (they are in a 30x30m raster) in each of the small watersheds. I tried ...
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0answers
119 views

Combining (merging) neighbour points to one centred point in PostGIS (reducing density)?

I'm new to spatial algorithms and PostGIS functionality. Currently I have a Pg 10 + Postgis 2.4 database with table of more than 400 000 records (points with additional properties), with Node.JS tile ...
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0answers
41 views

Combine attributes (lines) within an attribute table QGIS [duplicate]

I have an attribute table with 100 LINES. The table has a DATE field. The 100 LINES have several DATE values. I would like to combine all LINES with the same DATE value. How can i do that?
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1answer
255 views

MMQGIS Combine Layers OGR error: Can't create field

I am trying to combine about 20 shapefile vector layers in to one shapefile using MMQgis - but I keep getting the error below. Failure creating output shapefile: creation of field Bergen_FAC failed (...
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0answers
39 views

Displaying all townships a lake falls in

I have a shapefile for lakes, and one for townships. Both are polygon files and all lakes fall inside at least one township and I'm using ArcMap. I'm trying to find a way to quickly and simply ...
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0answers
206 views

Combining touching polygons

PROBLEM STATEMENT I am trying, based on previous posts in this website, to combine polygons within the same layer but just when they touch each other by means of pyQGIS. It doesn't work (proper ...
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1answer
111 views

Merging XML files [closed]

I am doing research about the city of Hamburg and I downloaded a dataset containing georeferenced point data of every house in Hamburg. The problem is that the dataset is made up of about 250 ...
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0answers
34 views

ArcGIS Combine Tool Returns Empty Atttribute Table?

I am attempting to combine six rasters using the ArcGIS 10.5 Combine tool. I ran this on three similar rasters and it worked. However, when I run with the new rasters it returns an empty raster with ...
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1answer
124 views

Creating prediction map by combining several rasters and vectors in ArcGIS Desktop?

I have three 'variables': 6000 GPS points that represent where my focal species (a carnivore) is present. Attached to these points is one value representing the activity level of the animal at the ...
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1answer
597 views

Combine points in QGIS

I have some points and vector grid in .shp files. I need to combine points which are in the same cell(or cross cell) and sum their values. How can I do this in QGIS?
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0answers
176 views

Determine Geometry of Multiple Layers in QGIS

I am sure this is a newbie question. I am importing a large number of layers into QGIS from a complex .kml file and need to combine into a single layer and finally save as a .shp file. I repeated ...
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1answer
349 views

How to merge a overlapping points into a single feature to reduce Map “noise”

I have a shapefile of the locations of wind turbines within the central flyway. I was attempting to show the size by the total number of turbines however I am having a problem with many large scale ...
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0answers
48 views

Is there a PostGIS equivalent to ESRI Spatial Analyst COMBINE?

The ESRI Spatial Analyst COMBINE tool accepts multiple raster inputs and outputs a new raster with a unique number corresponding to unique combinations of values from the inputs. It also provides a ...
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0answers
60 views

Combine two rasters sets using weighted geometric mean

My question is: How can I combine two to four raster layers using weighted geometric mean? I am using ArcMap 10.3. I want to use the weighted geometric mean since it nicely reflects a situation when ...
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0answers
71 views

Sort a Raster attribute field in ArcGIS

I need to combine several rasters. One of them has an alphanumeric data in the attribute I need to combine. However, when combined the output raster has a 'LONG' attribute type where should be 'STRING'...
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1answer
73 views

Aggregating multiple layers while preserving values using ArcMap?

I am using ArcMap 10.5 to display the distribution of Revenues by Region, for each product I have defined. Each product has a layer of its own consisting of a collection of polygons, and each polygon ...
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1answer
161 views

Combining > 20 rasters in ArcMap

I have 30 rasters with 0 and 1 values and I want to combine them into a single raster using the combine tool. However, combine tool has a 20 raster limit, so my here is my current approach and code: ...
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1answer
79 views

Combine / Group - ArcGIS attributes table [closed]

I need to group several rows in a single one, combining data cell (mainly “text”) in Arcgis desktop 10.2.2. One cell could have several records separated by comma. I have attached a screenshot in ...
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1answer
78 views

Dissolve adjacent polygons into collections of larger polygons, rather than a single überpolygon

I have a county's worth of census tracts, and I need to combine adjacent tracts into larger polygons. Here's an example of what I'm looking for: This is four smaller tracts combined into a single ...
3
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1answer
59 views

How can I create a csv file starting from a layer with some boundaries to a layer with others boundaries?

I have a vector layer with the definition of the blocks of the state of NY, and I have another vector layer with the definition of the group blocks of the state of NY. They are two different vector ...
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3answers
131 views

Integrating raster datasets using ArcGIS for Desktop?

I have two raster datasets. One raster dataset shows population density, with the range of population density values given a score from 1 to 10. The score is entered into a separate column. The ...
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2answers
283 views

Seeking tool in QGIS similar to ArcGIS Combine?

I am wondering if there is a way/tool in QGIS (2.6) could produce similar output as ArcGIS "Combine" tool does. I am trying to integrate values from overlapping rasters, and then create a single ...
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0answers
65 views

Combining two rasters into heatmap using QGIS? [closed]

How to combine two rasters so that the heatmap is following according to the relief or shade layer (so that it does not look patched)?
3
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2answers
2k views

How to mix two raster in R (same extent)?

I want to produce one PNG image for each country in the world. The pixel colors come from a raster that describes the vegetation, and the boundaries of the countries come from a shapefile. I managed ...
2
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1answer
372 views

R and osmar : How to merge two adjacent osm files with overlapping nodes and ways?

Due to a problem loading large osm files in osmar, I have decided to split my osm file in small parts, load them individually and the merge them. I currently face two problems : The code splitting ...
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1answer
223 views

How to combine two QML files?

I am making a plugin. I have two QML files for the same layer and column. I want the plugin to combine the two existing files into a new QML file and then I will select which one symbol for each value ...
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2answers
230 views

Combining different geometry types in ArcGIS for Desktop?

Two geodatabases have been created using split by attribute tool from CAD drawing file. One gdb is from polyline layer and another from polygon layer of input drawing file. I want to combine ...
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1answer
69 views

How can I combine together cells within the same raster in ArcGIS 10.2?

I have a raster displaying Land Cover data for the UK at a cell size of 25m. The cells are currently categorised as one of 24 different types of land cover. Some of these are irrelevant to me, and ...
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0answers
53 views

ArcGIS, Combine tool. Crashes once reaching 40% progress

I'm trying to combine 7 rasters containing soil related data. Rasters are 4.5G, give or take. All the rasters contain integer values. Once the combine tool reaches 40% progress, it stalls and arcmap ...
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1answer
175 views

Connect data from two different layers

I'm trying to connect data from two different layers to combine them in one new layer and continue working with them. Let me explain that a bit more detailed: The first layer contains data (and ...
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1answer
99 views

Using Combine function of ArcGIS Spatial Analyst?

I am trying to use the combine function on ArcGIS 10.3 for Desktop. I have two raster files that have the same values and I want to combine them in order to compute an accuracy assessment through ...
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1answer
49 views

Combine tool: Does it perform a union or intersect operation?

Can I use combine with different shaped rasters? Does it perform a union or intersect algebra operations with the fields?
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0answers
25 views

Value of Raster when we combine 2 raster. (New value not = with old value) [closed]

I have two raster in ArcGis (Number 1 is water level, Number 2 is water depth). I want to combine it to only one raster with two field value. I used Combine Tool in toolbox in ArcGis. After that I got ...
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2answers
8k views

In QGIS combine multiple polygon parts of a single feature

This is a repost of my unsolved QGIS dilema. The image shows a single selected feature that consists of two polygons and the corresponding attribute table. Some nodes of the left poly have been added ...
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1answer
717 views

Combining rasters using weighted average

I am using ArcGIS 10.3 with spatial analyst. I have a series of several rasters that I am trying to combine into a single raster layer. The rasters are all different sizes (different extents) and were ...