Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [combine]

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

1
vote
0answers
21 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 ...
0
votes
1answer
42 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 ...
0
votes
0answers
25 views

Get informations for each grid cell [duplicate]

I have two shapefiles. One of them is a road network and the other one is a grid. For each cell of the grid I want to have the specific road network informations. Is this possible? road network and ...
2
votes
1answer
38 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 ...
0
votes
0answers
13 views

Evaluating cell values from several rasters to generate one output [duplicate]

I have temperature and precipitation data that I am evaluating in the same method that Wordclim Bioclimatic variables are evaluated. Each raster is floating points format. I am using ArcGIS 10.6. I ...
1
vote
0answers
43 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 ...
0
votes
0answers
45 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 ...
1
vote
1answer
58 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 ...
0
votes
2answers
50 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 ...
2
votes
0answers
71 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 ...
0
votes
1answer
103 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?
0
votes
1answer
48 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 ...
1
vote
0answers
37 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-...
1
vote
3answers
991 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 ...
0
votes
0answers
118 views

How to add, overlay or merge 2 rasters with different classes together?

There are two rasters as presented in the images. The first raster represents danger area with classes Low(1), Moderate(2) and High(3). The second raster represents additional danger, which is ...
1
vote
3answers
585 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 ...
1
vote
0answers
89 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 ...
1
vote
0answers
34 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?
2
votes
1answer
194 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 (...
0
votes
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 ...
1
vote
0answers
140 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 ...
1
vote
1answer
93 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 ...
0
votes
0answers
33 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 ...
1
vote
1answer
88 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 ...
0
votes
1answer
448 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?
2
votes
0answers
157 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 ...
0
votes
0answers
32 views

How would one go about combining multiple raster images into a single image and averaging their value? [duplicate]

I have 12 raster images and am trying to find a way to combine them into a single raster image where the pixels consist of the average value of the composited images rather than a sum. How would one ...
1
vote
1answer
313 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 ...
2
votes
0answers
46 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 ...
1
vote
0answers
54 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 ...
1
vote
0answers
68 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'...
0
votes
1answer
66 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 ...
1
vote
1answer
143 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: ...
1
vote
1answer
64 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 ...
0
votes
1answer
68 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
votes
1answer
54 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 ...
1
vote
3answers
114 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 ...
2
votes
2answers
252 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 ...
1
vote
0answers
55 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
votes
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
votes
1answer
349 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 ...
1
vote
1answer
189 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 ...
0
votes
2answers
171 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 ...
0
votes
1answer
62 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 ...
1
vote
0answers
48 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 ...
4
votes
1answer
156 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 ...
0
votes
1answer
90 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 ...
0
votes
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?
1
vote
0answers
24 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 ...
2
votes
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 ...