Questions tagged [merge]

To combine two or more parts into a larger whole.

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QGIS 3.4 bug merging layers

I have some difficulties with the tool Merge vector layers (free translation from French). The result of the process is an empty layer of the line layers. It is strange, because I did it with two ...
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49 views

Merging Degree Two nodes in Stream Network using QGIS 3.4

I have a stream network and I want to convert it in graph like data structure, for which I need to have precise set of FROM and TO vertices.The geometry of stream network is not correct i.e. the ...
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Merging layers to intersect and count (tally) multiple fields in QGIS?

My question is similar to Performing multiple layer intersection in QGIS? However, there are a few differences. I have run a test analysis on a dummy data set and cannot replicate the result with my ...
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Merging polygons in ArcMap?

Inside the red circle, there are two yellow polygons of different sizes inside the large polygons. There are many such polygons. I want to merge the attribute information of a large yellow polygon in ...
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How to merge / join line segments by attribute and split at intersection

I have a complex network of line features with a lot of attributes (and unique IDs). Many features have the exact same values (exept the ID). I need to join all features with the same attribute which ...
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109 views

Merge shapefile data within the same spatialpolygonsdataframe in R, when not all data have the merge column populated?

I have a 156Mb shapefile of New Zealand polygons down to the individual suburb level. There are 7,369 polygons. Each polygon has a unique ID (1...7369) in an ID column. There is a Suburb column ...
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132 views

OSM.PBF does not contain all exported/merged/converted data from XML using OSMIUM/OSMOSIS

I have three pbf files, each containing poi nodes x ways y multi-polygon relations z separately. I tried merging them using: osmosis --read-pbf file=x.pbf --read-pbf file=y.pbf --read-pbf z.pbf --...
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QGIS 3.4 merge raster output only 1 px wide

I have four .xyz files with terrain data. I can convert them to TIFs in QGIS 3.4, but in either format, merging them fails. The merge output always has the X dimension of the merged rasters, but a Y ...
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175 views

Merging layers with different objectid types

I have a problem that's stumped me. I'm merging flood hazard layers from FEMA. For most states, the objectid is a real number. California (we're always the weird ones) has an objectid that's '...
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88 views

Merge gives an empty output

Within ModelBuilder I've got an orginal file, out of this file a few locations are extracted by mask and the data has been changed afterward. Now I am trying to put this data back by first erasing the ...
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240 views

Merge two shapefiles into one new shapefile with OGR/GDAL library in C#?

I am currently coding a C#/WPF application that lets you choose two shapefiles and create a new merged one, with the content of both shapefiles. My problem is that I am quite new (1 month with gis) ...
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536 views

Using GDAL or Python, how can I merge/combine 3 NITF images (RGB) into one image and keep the RPC metadata intact?

I'm looking to merge 3 imagery bands that are saved as separate files. The file format is NITF. The reason they are saved as NITF is because they have RPC metadata embedded into the images. I would ...
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121 views

batch merge error: Error in match.arg(method) : 'arg' must be of length 1

I am attempting to read in a series of polygon shapefiles from a directory and batch merge them into a single shapefile. They all have the exact same field names. I am using this code: all_data <-...
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86 views

Python - Merge shapefile polygons based on criteria

I have a shapefile with thousands of polygons and would like to merge (join) adjacent polygons based on a threshold between attributes. I need to use python because I'm not allowed to use ArcGIS. e.g....
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291 views

Combine GeoJSON files into bigger shapes with external JSON to merge on

I have a shapefile of New York ZCTAs here I also have these neighborhood definitions that map zip codes to New York City Boroughs. I'd like to take my "all of New York zip code" data and: Clump up ...
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38 views

Convert shapefile to KML: KML polygons don't match shapefile

I've edited my shapefile quite a bit using the Cut and Merge tool (through the Editor toolbox, not the geoprocessing tool). It looks like this: For some reason, when I export the shapefile to a KML ...
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90 views

Appending multiple FeatureClasses to one another gives ERROR 000735?

I have 5 fairly large Feature Classes with identical fields but different attribute data which I have been trying to merge/append together unsuccessfully. When using merge_management the process ...
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76 views

ogr2ogr merge fgdb (while importing to PostGIS)

I have millions of records and hundreds of tables in several file geodatabases.. The tables name in these FGDBs are all same but just in different areas. For instance, the Admin table, you see below,...
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414 views

Merge multiple raster .tif in QGIS 3.2?

I'm trying to merge 12 .tif raster layers (raster -> misc -> build virtual raster), but keep getting this error: Loading resulting layers The following layers were not correctly generated./var/...
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85 views

Keeping my changes up to date with OSM

One year ago, we exported data from OpenStreetMap. We added attributes and cut some segments with JOSM. Now, we want to update those files (.osm) to the current state of OpenStreetMap. How can we ...
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794 views

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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112 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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44 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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134 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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43 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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127 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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62 views

Can't upload .osc to local Rails Port instance

I have been experimenting with a local instance of Rails Port. I used osmosis to load a small pbf of my neighborhood. Using JOSM I edited some data on the local instance. Then a few weeks later I ...
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59 views

Overlapping features and attributes help

I'm using ArcMap 10.3 and am looking for some guidance on how to "connect" two layers. Layer one contains non-overlapping polygons (site) Layer two contains overlapping polygons (species) I would ...
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65 views

Why do merged rasters in QGIS look 'patchy'?

Poor title for this question, but I can't think of a better way to explain it. I have merged two rasters. I want the joins to be seamless, but there is an obvious line where they meet... I've tried ...
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225 views

Merging polygons interactively in ArcMap using less clicks than Merge tool?

I am looking for an interactive tool which simply merges two polygon geometries by clicking on each polygon and nothing else. I need a workflow for a particular project-step which cannot be automated ...
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408 views

How to merge raster quadrangle tiles in qgis?

I've downloaded some dem tiles from here http://www.granit.unh.edu/data/search?dset=dem/dem174, which I'd like to merge into a single smooth digital elevation model usinq QGIS. So far I've tried ...
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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 ...