Questions tagged [merge]

To combine two or more parts into a larger whole.

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Collapsing parallel lines into a single line QGIS

I have a shapefile of the Washington metro area, but along much of the route multiple lines run parallel to each other (see picture 1) and I need to collapse them into a single line. I've tried ...
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31 views

Merge two reflectance layers in QGIS

I currently have two Landsat 5 reflectance value layers that were calculated from the per-processing function in SCP for QGIS. I would like to merge these two images together to create one mosaic ...
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3answers
140 views

ArcGIS merge polygons (catchments)

I have a shape with 113 polygons. (partial catchment in hydrometric station sections). Is there any method, in ArcGIS, to overlap and merge polygons from upstream to downstream, in order to results a ...
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2answers
603 views

Combining multiple geodatabases into one master geodatabase? [closed]

I currently have geodatabases for each project within a specified area. I would like to combine all of these geodatabases into one master geodatabase. Some of the geodatabases contain some of the same ...
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1answer
51 views

Merge points within each polygon

I have multiple polygons that have zero to 4 points (sampling sites with a list of species) in them. I need all the information from these sampling sites ONCE per catchment. So instead of up to 4 ...
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1answer
353 views

Merging hundreds of rasters in QGIS to create a basemap

I have a dataset of over 400 .tif-files, which I'm supposed to merge in QGIS into a single layer, representing a base map. These .tif files are pieces of a topography map (scale of 1 to 50000), and ...
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1answer
293 views

Packing tiled rasters into a Geopackage in QGIS 3.0.3 whilst maintaining the colour

I have a folder containing 79 tiled Geotiff rasters making up a basemap of the UK. My goal is to efficiently store these in a Geopackage which already contains some vector data also used for base ...
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1answer
677 views

How to merge polygons that have the same values in one column in Geopandas?

I have an shp. with these columns: ind code area 1 12 200 1 12 100 1 12 23 2 30 223 2 30 112 3 29 234 4 20 232 5 23 211 I want to combine each polygon with the same ...
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1answer
490 views

How to set the “LAYERS” parameter of the QGIS 3 algorithm “native:mergevectorlayers”

I do not understand how to set the LAYERS parameter for the QGIS 3 native: mergevectorlayers algorithm (for standalone python code). Merge vector layers (native:mergevectorlayers) ... ----------------...
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1answer
851 views

Merging vector layers in QGIS

I have been trying to merge about 40 layers for a while now but I keep getting this error message: {} field in layer {} has different data type than in other layers. I have actually done in before ...
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106 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
2k views

Merging Multiple Shapefile Polygons in R

I have a regional shapefile of England and Wales but without containing Scotland and Northern Ireland. I want to add the outlines of Scotland and Northern Ireland in without regional divisions so ...
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345 views

Error Code -2147483647 when combining vector layers

I am trying to combine multiple vector layers in QGIS using the "merge vector layers" function from the dropdown lists (vector -> Data Management Tools -> Merge Vector Layers) All data are ...
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1answer
263 views

Merging shapefiles and saving them to file geodatabase using ogr2ogr?

I have multiple shapefiles. When it becomes one layer (one shapefile) the volume of shapefile gets over the limit of its capacity (I believe 4GB? is the limit of *.shp can have) Therefore, I need to ...
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1answer
239 views

ArcMap Way to merge two shapefiles and take the average of their polygons that overlap?

So I have two shapefiles that show storm surge height values for two different areas. Nevertheless, they overlap for a good portion of their areas. When I merge them together, it seems that the ...
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1answer
67 views

Merging two vector layers with nearby features in QGIS

I am using QGIS 2.18 I have two shapefiles containing bus stops the first file(old_stops) has 144 stops, the second (new_stops) has 5. There are 3 stops in the new_stops file that are practically ...
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1answer
79 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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397 views

Merging asc files in QGIS?

I am trying to merge 8 .asc files using merge option in QGIS 2.4 but when I do that it makes like contour of the file when I want to merge the files together. .ASC Files: Result after merging:
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42 views

Trying to merge convert mult linestrings with breaks

I am trying to clean up a road network file. The roads are encoded as multlinestrings I want them as linestrings. Normally I would use st_mergeline to convert from a multilinestring to linestring. ...
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1answer
89 views

Combining two models, one having an iterator

I have two different ModelBuilder models: Create a new field and split a layer Merge all layers in one folder I want to append both models in one but it does not work. The Model have a loop and I ...
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2answers
2k views

QGIS change geometry type in shapefile

I have 7 shapefiles which I would like to combine using the 'Merge shapefiles' function in QGIS. I got the error message that the shapefiles must all be the same geometry. I checked this, one ...
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2answers
257 views

Inserting lake in height map using QGIS?

I am trying to merge two height maps in QGIS. I have DEMs of the lake of constance in germany. It is a result of a goverment project and the data is available in a asc format. I want to 3dprint a ...
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2answers
193 views

Merge 2 columns with numbers and NULL cells (QGIS)

I have an attribut table with 2 columns like this : Column A Column B 22 NULL 23 NULL 24 NULL 25 NULL 26 NULL NULL 52 NULL ...
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2answers
344 views

Merging LiDAR tiles without losing data in QGIS?

I'm trying to merge some LiDAR tiles together but when I do, the clarity of the image drops, so I think that means I am losing some data. How do I merge the tiles and keep all of the data and the ...
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1answer
66 views

Assigning existing geometry to another layer in QGIS?

I have several line layers that run parallel to each other and would like to assign the geometry of the central line to all the others without losing information in the attribute tables. Is there a ...
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1answer
49 views

Combining two layers and removing their overlap using ArcGIS Desktop?

I am using ArcGIS Desktop 10.0. I have two polygon layers showing storm surge and I want them both to be combined to look like a smooth transition into each other. However, they have an overlap and ...
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3answers
395 views

Merge overlapping points in the same layer by maintaining both attbributes

I have a road network layer where each line segment is broken off by intersecting line features. I ran the intersect tool to create points along each line intersect to represent 'Intersection' point ...
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133 views

Converting ESRI Grid to GeoTIFF and writing to NetCDF

I'm trying to loop through and read a stack of ESRI grids in a specific projection, convert them to GDAL and then write them out to a NetCDF, but I've never performed this from scratch and I'm running ...
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1answer
276 views

Merging multiple non overlapping raster layers into one layer

I'm working in Qgis 2.14 and have received multiple raster files for the Height of a terrain that combined covers the entire terrain I’m interested in. I would like to combine them. Because the ...
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1answer
266 views

Creating new field with values from different fields QGIS [duplicate]

I have combined different layers (vector) in a merged layer. All layers had one specific land-use type, so now the new layer has fields called 'tree', 'paved', 'building', 'water' and 'plants'. All ...
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3answers
533 views

Merge layers that have different coordinate systems

I need to merge two shapefiles and the issue is that one shapefile has WGS 84 coordinate system and the second OSGB 1936. When I try to do the trick with MMQGIS -> Combine -> Merge layers I get an ...
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1answer
55 views

Merging a temperature point layer with a vector layer for statistical analysis in QGIS

I have a point layer with x,y,z coordinates with geothermal temperature data. This data should be related to a given vector layer of political communities. In order to analyse every single community ...
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2answers
509 views

Merging polygon slivers to largest adjacent polygon using ArcGIS Desktop?

I've got several hundred thousand slivers in my dataset as a result of cutting in a layer. Does anyone have a good solution as to how to have ArcGIS Desktop evaluate the position of each sliver and ...
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1answer
788 views

Spatially merging NetCDF climate grids?

I'm currently working with a large number of CF-compliant NetCDF climate grids with global coverage that are organized as tiles across a file structure pertaining to particular "variables" and "years" ...
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1answer
252 views

Merging two spatial objects in R: spCbind gives error “row names not identical”

I have two SpatialPolygonsDataFrames. One is the LSOA shapefile of Great Britain (i.e., Great Britain divided into ~41,000 regions with approximately equal population densities), the other is a bunch ...
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2answers
68 views

Correcting merged LiDAR DEM with outliers in inner edges?

I've created a DEM from LiDAR data. After combining all the files, I could see that there are some problems through the tile borders. This is an screen focused in one of the cross section of 4 files ...
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41 views

Using Workspace To Raster Dataset tool in ArcGIS Desktop?

I am going to use the "Workspace to raster dataset" tool to merge several tif files. I have 4 test images (same area, same geographic, just different in time). The input workspace has been set up, ...
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3answers
646 views

Combine multiple rows in attribute table into one

I'm running into problems while trying to edit some data. I'm trying to merge a number of land-use categories into less categories. So for example I have 5 types of "forest" which I want to merge ...
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1answer
654 views

Merging neighbouring polygons with QGIS

I have a polygon layer that consists of many different polygons; some of them are neighbouring and some of them are not. How could I merge the neighbouring polygons?
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1answer
322 views

How to fill the void/empty space between two polygons

I am using QGIS 3.01 I am wondering how I can get get rid of the empty space that is splitting the polygon in the picture into two pieces. I know I can edit the polygons together, but is there a ...
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126 views

Geoprocessing tools won't work with the WDPA (World Database of Protected Areas) database

I am trying to run spatial stats (% area of overlap of various datasets) with the World Database of Protected Areas marine shapefile. It's a global collection of marine protected areas, so it's a big ...
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0answers
133 views

Set a rule for grow region in eCognition

I am using the grow region algorithm in eCognition sofrware in order to merge my candidate class. I want to set the rule : two candidated objects are merged only if the length/width ratio of the ...
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1answer
1k views

Merging rasters using QGIS raster calculator?

I have 102 .tif files to merge. I want to use the raster calculator on these, but it said there was not enough memory when I tried using the raster calculator on the virtual raster of all 102 files. ...
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1answer
387 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
426 views

Merging overlapping polygons with original polygons in QGIS

I have a large vector shapefile dataset containing polygons, many of which overlap. I want to assign each overlapping section to one of the original overlapping polygons. E.g. if polygon A overlaps ...
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1answer
97 views

Merging OnTheMap's point jobs data with Census Block Groups shapefile using ArcGIS Desktop?

I'm trying to figure out an easy way to take county level jobs point data (exported from the Census bureau's OnTheMap) and merge it with census block groups in order to give each block group a total ...
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2answers
2k views

Merging raster in QGIS?

I have a huge problem that I can't solve even after trying everything I can think of. I am trying to do some analysis of the Lake Chad basin in QGIS (2.16.3). I downloaded Landsat 8 data from Earth ...
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0answers
76 views

Adding shapefile name as attribute? [duplicate]

I have 397 shapefiles that I need to merge into one shapefile, and I need to add an attribute for the name of each of the shapefiles. I have no experience in coding/ Python. Is this possible to do ...
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1answer
44 views

Merging many different feature classes into one but only taking certain fields from each?

I'm trying to merge ~50 feature classes into 1. The problem is, these feature classes have many different fields, and some that i don't want in the final FC. I can delete the fields one by one ...
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1answer
31 views

Merging shapefiles and creating unique feature wherever shapefiles' features overlap using ArcGIS Desktop?

I am using ArcGIS Desktop 10.5. I have a shapefile for impervious surfaces and a shapefile for tree canopy. I need to separate the tree canopy features into tree canopy that overlaps (is assumed to ...