Questions tagged [merge]

To combine two or more parts into a larger whole.

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1answer
806 views

How to merge layers into a single QgsVectorLayer?

I have a set of different layers (and their respective shapefiles) with information of electric lines. All the layers have the same Fields in their Attribute Tables, but contain information about ...
2
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1answer
1k views

Merging adjacent polygons in QGIS

I have a set of polygon layers with thousands of polygons some of which are adjacent (Either rings or simply adjacent). I would like to simplify this polygons by merging them. Is there a way to do ...
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4answers
22k views

Merging polygon and point Shapefile in ArcGIS for Desktop?

I have two shapefiles that I want to merge. One is of polygons, the other is a point file. The polygons are missing information in the attribute table that the point file has. In general, the two ...
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2answers
82 views

Merging polygons that share one vertex (node neighbors) using ArcGIS Desktop?

I have a set of very large shapefiles and would like to merge polygons within these that share one vertex. Currently they are all separate like so: What tool can I use to merge all the polygons ...
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3answers
2k views

Merge Zip Codes to Create new sales Markets

Let me preface this question by saying I am very novice with respect to GIS. With this in mind, I am looking to merge zip codes into sales territories. Instead of plotting data by zip code, I want to ...
1
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2answers
575 views

How to add state polygon information to a city point?

I have the following layers: Country border federal state borders cities (located as points) I would need the following result file (txt or csv..): A column with the name of the city and another ...
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2answers
8k views

Layer stacking Sentinel 2 imagery

Is it possible to layer stack all 13 Sentinel 2 bands or can I only layer stack those that are the same resolution (so for example the blue, green red and NIR bands). I have a very large area of ...
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1answer
2k views

Merge Multi-Band Geotiff with different datatypes (with gdal)

I have three geotiffs: orthomosaic.tif: a multispectral orthomosaic with three channels: Band 1 Block=512x512 Type=Byte, ColorInterp=Red Band 2 Block=512x512 Type=Byte, ColorInterp=Green Band 3 ...
6
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2answers
2k views

Alternative to 'Editors Merge' feature using ArcPy

I'm looking for a work around that has had me in a pickle for sometime. It involves combining a multi-part feature polygon into a single feature. Obviously if you were editing a shape you would select ...
6
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2answers
2k views

Loading multiple shapefiles from +1000 subfolders

I have a WATERBODY shapefile for each region within each province in Canada. The region subfolders also contain many other features that I do not need. I am trying to upload and merge all the ...
5
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2answers
1k views

Shapefile Naming conventions in ArcPy?

I have shapefile named `band-tailed_pigeon.shp which is fine and no problem on displaying or geoprocessing on Desktop but in ArcPy when I try to merge some layes to it I am getting this error ...
5
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1answer
2k views

Using ArcPy to batch merge based on shapefile name?

ArcGIS 10 SP4 Python 2.6.5 I have quite a few shapefiles that are in many different directories. I'd like to pull out groups of like shapefiles, merge them, and move the results into a FGDB. I've ...
5
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1answer
2k views

Failing to merge rasters in QGIS

I am new to QGIS but have some familiarity with other GIS software (namely ArcGIS). I want to merge a number of LiDAR digital elevation model (DEM) tiles (specifically, 30 individual tiles) to create ...
4
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3answers
720 views

What method does QGIS Merge Rasters tool use?

I am trying to merge rasters in QGIS and want to set a priority order for merging so that the values from the highest priority raster are used in overlap areas (the “FIRST” merge/mosaic method, I ...
4
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3answers
451 views

qgis:mergevectorlayers won't allow two layers for the second arg

I've been searching the web with no luck. This old exchange should be exactly what I need: Merging vector layers via python in QGIS 2.18.1 My code looks like this: processing.tools.general.runalg("...
4
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2answers
1k views

How to get the command line of QGIS algorithm “Merge vector layers”?

To insert this function to my program I want to know what is command line executed by the algorithm "Merge vector layers" using QGIS GUI.
4
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2answers
3k views

How to join lines in QGIS for later using “lines to poly”?

After successfully merging lines (using snapping) with merge_selected_features i got nice result - one merged line. Next thing was to make polygon from created merged line. Result is not nice - it ...
4
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2answers
36k views

Merging DEMs in ArcGIS Desktop?

I'm trying to merge some DEMs downloaded from USGS. When I used ArcGIS 9.2 there was an expression to be used in raster calculator to do that. I used it again but, unfortunately, it doesn't work in ...
4
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1answer
3k views

Difference between 'join' and 'merge'?

Suppose one wants to make polygons A and B, and their respective attributes to be one unique polygon C. What is this GIS operation called? Is there any difference in GIS terminology about "joining" ...
3
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1answer
407 views

Union/Merge 3D polygons (POLYHEDRALSURFACE Z) each with different heights to output a single polygon in PostGIS

While attempting to ST_Union, ST_Collect, ST_3DUnion an array of POLYHEDRALSURFACE Z geometries with different heights, the output is always a multipolygon with interior walls. I need to fully merge ...
3
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1answer
112 views

Assigning common field value to segments between two points using ArcGIS for Desktop?

I am using ArcGIS 10.3 for Desktop. I have a shapefile with polylines connecting points. Instead of having one single polyline connecting two points, there exist a number of consecutive segments ...
3
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6answers
17k views

Merging multiple .tab files?

I was wondering if there was a quick way to merge multiple .tab files together? I have about 100. Would appending one tab to another with the MapBasic window open, then changing the name of the ...
3
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2answers
426 views

How to merge same long lat points with different data into a unique one?

I have a layer where there is more than 1 feature for a same object. Imagine i have a layer called signals. There can be up to 10 features in the same place (long/lat) for a unique signal but the ...
3
votes
1answer
708 views

Merging two adjacent polygons which borders are not touching each other?

I want to merge adjacent single polygons which are apart from each other. Important note: I cannot use ArcGIS, I need to do this programatically, in any language (R, Python, Ruby, PostGIS) doesn't ...
3
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4answers
6k views

Mosaic to New Raster tool fail

I'm trying to merge 24 DEM files, after applying the tool (Mosaic to New Raster) only 11 out of the 24 merged. All the original files are in the same projection, pixel type, band, etc. I also ...
2
votes
1answer
237 views

Merging multiple bus stops with same name using QGIS?

My question is similar to Merging points (bus stops) in QGIS manually or programmatically?, but it's not answered sufficiently I have OSM-transit data with bus stops. Some stops have two or more bays ...
2
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2answers
875 views

Using Python to execute merge of rasters

I need help with a python script to iterate merge (gdal_merge.py) of rasters: For each folder located in /home/geodata/sentinel2/ look in subfolder IMG_DATA and merge the three rasters with ...
2
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2answers
4k views

Combining touching polygons, keeping all attributes from Class “A” feature, using ArcGIS Desktop?

How to automatically merge polygons sharing a common boundary, keeping all attributes from class "A" features? Interactively I would do this in an edit session by: selecting all objects of Name "...
2
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2answers
574 views

Fast way to merge 8000 raster?

I have to merge almost 8000 rasters (TIF). I tried using Mosaic To New Raster in ArcGIS 10.3, but it's processing really slowly and crashes quite often. Is there a faster (or more stable) way to ...
2
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1answer
2k views

Merging multiple LiDAR (.las) files?

I downloaded about 9 LiDAR scenes from USGS and I want to use ArcGIS to merge them so that I can carry out tasks on them together as opposed to one by one.
2
votes
1answer
947 views

Dissolve overlapping polygons in R

Is there an analogue of ArcGIS Dissolve function in R? I need to dissolve the overlapping polygons and create a single part object. I was trying to use gUnionCascaded, but it creates a multipart ...
2
votes
1answer
398 views

Merging and snapping Tiger line files

I have several adjacent (county level) TIGER road files. I want to merge them and create one contiguous file of snapped roads for the purpose of doing network analysis. Merging them is easy but ...
2
votes
2answers
240 views

QGIS Merge rasters without projection edges

I have been trying with no luck to merge forest canopy rasters available through the NLCD (e.g. Grids 102 and 105) using QGIS in Mac (as well as R, and SAGA in Windows). The GeoTIFF grids import and ...
2
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3answers
2k views

Merging large amount of polygon-features in script with GDAL/OGR Tools or Python?

We have a very large shapefile with over 30000 features and want to merge it with a script on a server. Currently we try it with QGIS, but the processing takes way too much time. Is there a way to do ...
2
votes
1answer
511 views

Losing features when merging vector layers in QGIS?

Update: Trying the v.clean command and checked the layer with Topology checker and it turned out every singel geometry was invalid?! What to do now? Original question: I have two shapefiles with 3D ...
2
votes
2answers
1k views

Merging vector (building) elevations into DEM in QGIS?

I'm no expert in QGIS, I'm more into engineering. I'm building a 2D hydraulic model and I would like to add the building footprints (elevated) to my DEM, so flow will go around structures in the ...
2
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2answers
1k views

ArcGIS 10.3: How to merge lines divided by junction points?

I have one shapefile with train stations (points) from a region in the UK and another shapefile with railroad tracks (lines) between these stations. Problem is, in the latter I don't have a unique ...
2
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3answers
1k views

Keeping leading zeroes in QGIS in big files

I am trying to load a file with many columns into QGIS. With both .txt and .csv format the leading zeroes of some data values get lost. However, I need the leading zeroes to merge the file with a map. ...
2
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0answers
121 views

Joining 2 vector pieces of one country into one vector polygon using QGIS?

How to eliminate seam on meridian 168W. Seam is on Russia and Antarctica? I have done my projection in this way: QGIS display world country shape files centered on pacific ocean using Robinson, ...
2
votes
1answer
482 views

Merge from arcpy.ListTables() producing duplicate rows?

I was trying to manually merge file geodatabase tables and was getting Null values for the output file rows and decided to write a python script to merge the files. Here's my script: import arcpy ...
2
votes
1answer
302 views

Combining DEM file with building (height) vector files using ArcGIS Desktop?

I am using ArcMap 10.2. I need a DSM file to use for my thesis to run visibility analysis on it, but my case study (Tehran) do not have LiDAR data. So I am thinking to combine a DEM file with ...
1
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1answer
900 views

How to batch merge rasters using FOSSGIS tools?

I'm working with QGIS 1.8 (gdal 1.9.2) and GRASS 6.4.3...but on Windows 7. I "just" want to merge my raster. I've got a folder with 50 GTiff raster from Lidar data. The aim is to merge raster ...
1
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1answer
115 views

Field mappings object not functioning with Merge_management

I'm trying to limit the number of fields when I perform a merge to two. Below is the script I have created to do so. However, the merged feature class carries over all fields, despite my use of a ...
1
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1answer
2k views

Using multiple tiff files as a data store in Geoserver

I have hundreds of tifs I want to use as a data store on my Geoserver. So many that QGIS won't merge them for me. I heard some about .vrt but I never found a clear source of information on the ...
1
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1answer
1k views

How merge osm files with same ID objects?

How merge many OSM files with same ID(between files) to one OSM file? I trying OSMCONVERT but he not add object with same ID in other OSM file.
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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. ...
1
vote
1answer
492 views

How to merge adjacent polygons with no common attributes in GRASS?

Many topics are talking about merging polygons based on their common attributes, but few (or none) give a real answer to location-based merging problem. Explanation. Here is a fraction of the base ...
1
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2answers
5k views

Different origin problem while merging rasters

I have two dem files downloaded via the getData function in the raster package. Here you can see the code: I tried to make the example reproducible so there you have it. library(raster) dem_n1<-...
1
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1answer
1k views

how to use union tool for merging more than two layers?

I want to combine different layers into one but I still want to identify different layers in the new combined layer. Union is best for this, but it doesn't allow me to combine more than two layers. I ...
0
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2answers
742 views

Unable to draw shape after shapefile merge

I have merged a bunch of shapefiles in ArcCatalog and get the "the selected file failed to draw...." error. Every thing has merged alright in the db. I'm new to GIS and could use some help. Each of ...