To combine two or more parts into a larger whole.

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4
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1answer
60 views

Merging Features

I want to merge features of a vector layer into one single feature using the python console. Somewhere I found the following solution. However it does not seem to work for me. When I execute the ...
2
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0answers
36 views

Losing Attributes Following Merge in ModelBuilder?

Using ArcMap 10.1, I am working on a project adding polygons to an aerial. The polygons have data associated such as Location, Numerical Value, Street Name, Date, etc... I use the merge tool as I am ...
2
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0answers
52 views

QGIS 2.12 LAStools lasmerge error: “no outputs specified” [closed]

I am trying to merge 4 .las files with "lasmerge" within "LAStools" in QGIS 2.12 running Windows 7 64. I keep on geting error "no outputs specified" even thoug i did specify the output folder and ...
2
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0answers
36 views

Combining adjacent shapefiles and merging neighbor polygons currently divided by quad boundaries

The project I'm working on has been mapping ecological sites in ArcGIS on a quad-by-quad basis for the past 10 years. When entered into GIS, each quad has its own shapefile and the sites are cut off ...
1
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0answers
38 views

How to join 2 vector pieces of one country into one vector polygon

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, ...
3
votes
1answer
27 views

QGIS: Mergin two layers always creates new attibute field

I want to merge several layers into one. Each layer has a specific Attribute field (type: GG, DO, eg.). In the merged layer QGIS produced a new Attribute field for each type. I want QGIS to but all ...
3
votes
3answers
131 views

How can I join two polygons that are within the same layer in QGIS?

I have two polygons in QGIS that are within the same layer and I want to merge them so they are not in two different polygons, which means that the gap between them sould not exist. How do I do that? ...
1
vote
2answers
135 views

Combine touching polygons, keeping all attributes from Class “A” feature

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 ...
1
vote
1answer
70 views

Merging two polygon layers with one layer having priority over the other

How do I merge two polygon layers? One is coarse scale over a large area (land use). The other is fine scale but is patchy (agricultural fields) in extent. I want the same extent of the land use layer ...
4
votes
1answer
159 views

Merging multiple feature classes in file geodatabase with ogr2ogr?

Is there a way to merge multiple feature classes into one feature class in a geodatabase with ogr2ogr? If this isn't possible with ogr2ogr, is there another method? I'm using the ESRI File Geodatabase ...
2
votes
1answer
31 views

Default attribute when merging two polygons in ArcMap?

When merging two polygons in ArcMap 10.3, it appears that the new polygon always inherits the attributes of the larger (by area) of the two input polygons, unless otherwise specified. Is this by ...
4
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0answers
26 views

“Merging” 2 layers of LineString with splits at intersections

I would like to "merge" 2 networks of lines and these lines need to be split when they intersect. With pictures it should be clearer : What to do: if a black line intersects a red line, they ...
2
votes
1answer
21 views

Concatenate geospatial pdfs

I am looking for a simple way to concatenate one geospatial pdf (with multiple layers in a single image) and regular pdf. I have tried tools such as pdfunite, pdftk and pdfconcat, without success. The ...
0
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0answers
22 views

Python Merge Error After Spatial Join Loop [duplicate]

I'm running into an error saying my Dataset doesn't exist when trying to merge a number of buffers that had be run through a Spatial join loop. I named my variables with the correct path(and double ...
4
votes
2answers
153 views

Merging rasters in QGIS?

I have 3 modis tiles that I want to merge together. They were all reprojected in the same CRS (from sinusoidal to WGS84 UTM zone 32 N), but I cannot succeed. I have tried with merge and virtual ...
1
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0answers
18 views

Trying to make one file out of many Hillshade files

I am trying to make a hilshade file for all of Colorado but when I download the DEM data for the state there are over 25 files. I have converted them all to hillsahde, but now I want to work with just ...
0
votes
1answer
42 views

Merge adjacent polygons

I want to write software that merges groups of (mainly) adjacent polygons. For example, merge the US counties into sales regions. Then, display either the boundary of these sales regions or fill them ...
0
votes
1answer
40 views

Merge several .lyr files that contain a raster photo column

Shapefiles do not support raster files, so I created a geodatabase and made feature classes of the points. I then added a column titled "photos" and added the photo as a raster to the point. I now ...
1
vote
1answer
80 views

How to merge two point feature classes based on spatial location using ArcPy?

I have two point feature classes, each containing about fifty points. These 2 point feature classes should be merged, or the points of feature class 2 added to feature class 1, as feature class 2 does ...
3
votes
1answer
88 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 ...
1
vote
2answers
102 views

gdalwarp - merge two images, but only the no-data values

I am preparing tiff elevation files. For one particular country I have a 10 meter elevation model, but the data is present only for the specific country - so when the image is sliced into smaller ...
1
vote
2answers
81 views

How to Merge, Buffer, and then Intersect multiple features based off of the Buffer feature in ModelBuilder

I have created what I thought to be a simple ModelBuilder model and the final output (.shp format) is always an empty. As you will see in the ModelBuilder image below: Merged 3 track logs now called ...
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0answers
20 views

Making Merge Tool run just once in ModelBuilder? [duplicate]

I have dozens of point shapefiles I want to merge. First I used the Feature Classes Iterator and declared the iteration output as input for the merge tool directly, the problem was that it merged the ...
3
votes
1answer
116 views

Merge connected lines IF they share adjacent polygon(s) (arcgis/arcpy)

I have lots of lines that I need to merge IF and only if they share the same polygon(s). All lines are made from the polygons (copy-paste into line) so they all snap. In this little example line ...
0
votes
1answer
332 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) ...
1
vote
1answer
116 views

Using lasmerge in QGIS 2.8.3 is not working: “…instance has no attribute”

Every time I try running lasmerge tool from LASTools within QGIS, I get the following error message: Algorithm lasmerge starting... lasmerge instance has no attribute ...
2
votes
2answers
71 views

PostGIS - Merging linestrings into multilinestrings in a particular order

I have a set of linestrings, which I want to group into a single multilinestring, and in a specific order. However, when I use ST_Collect, it merges them out of order, like this: Geometries as ...
1
vote
1answer
42 views

using arcpy.Merge_management

This script should make a field for all the feature classes in a geodatabase, populate the new field with the name of the feature class it's being created in, and then merge all the feature classes ...
2
votes
0answers
51 views

Fixing undesirable lines between tiles from SRTM contour line extraction?

I'm trying to make a South American topography map based on SRTM data on QGIS. The problem is a visual one. If the topography contours are extracted from individual SRTM tiles, it results a little ...
1
vote
2answers
93 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 ...
3
votes
2answers
134 views

How to Merge dbf files?

I'm beginner in python and learning it with examples. I have 100s of dbf tables like Type value1 value2 Type value1 value2 A 3 1 and A 5 7 B ...
1
vote
1answer
34 views

error when merging geotiffs

I have a problem with a actually simple task: I want to merge 12 Geotiffs in QGIS. With Raster => Miscellaneous => Merge there is always an error saying: xyz.tif does not exist in the file system, ...
0
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0answers
26 views

How to merge shapefile data and pick out what has changed in QGIS?

I work for a conservation charity just starting to use QGIS. I am starting to think about how to consolidate GIS shapefiles returning from different and separate project areas across the UK to be ...
2
votes
1answer
60 views

Merging more than 9 input files with lasmerge?

Is there a possibility to feed more than 9 LAS files to lasmerge tool? The user interface only allows 9 LAS files from LAStools toolboxes in QGIS or ArcGIS, but at liblas.org it’s described as there ...
1
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0answers
21 views

Merge without dissolve in ArcGIS for Desktop? [duplicate]

I am trying to merge several polygons in a feature dataset into one. Normally I would use a simple merge but the issue is that merge automatically dissolves. I on the other hand want to have them all ...
1
vote
1answer
57 views

How do I perform a Union (as per ArcGIS and QGIS) in MapInfo

I am running MapInfo 15.0 and need to perform a Union of two polygon layers (i.e. combine the two and preserve all boundaries and associated attributes). I know there is some ambiguity over the term ...
1
vote
2answers
229 views

How to batch merge shapefiles

I have a catalog tree with a number of subfolders. In every folder there is point and polygon shapefiles. What I want to do is for every type of shapefile point and polygon to do a merge by type. ...
1
vote
1answer
125 views

How to merge vector buildings height layer with raster DEM to get solar maps in r.sun in Grass GIS?

Welcome, this is my first post. I have vector layer with buildings heights and vector/raster DEM file. I need to create solar maps with sun radiance values on the roof (and on surface, ofc). I am ...
1
vote
2answers
41 views

Merge Ordnance Survey VectorMap District from different folders

I have four different folders with Ordnance Survey-Shapefiles from different regions. I want to merge all these files theme by theme (for example all buildings to just one shapefile). The problem ...
0
votes
1answer
50 views

Retaining UNIQUE attribute fields after dissolving a shapefile

I tried the solution to "Dissolving shapefiles but retain attribute fields" but my original shapefile (3000 rows in attribute table) has many duplicate values in the field that I want to retain so ...
2
votes
1answer
58 views

Change number of cells in raster using GDAL?

i have 5 raster files and i want to merge them to one file with exact 50x50 cells because i have an R script to process it later. I tried the ArcGIS function "mosaic to raster" but it delivers a ...
3
votes
0answers
95 views

Merge line segments by length (in QGIS)

I have a layer containing line segments which are connected by their endpoints (e.g. as within a street network). I'd like to merge (union) polylines within this layer into one feature until following ...
0
votes
1answer
46 views

Shapefiles failing to merge

I am attempting to merge two shapefiles together. Both are line features. I have merged these files before and it worked successfully however due to problems during editing I have to start again and ...
1
vote
0answers
142 views

Speeding up ArcGIS arcpy.Merge_management for MANY files? [closed]

I'm currently running a script that is using the arcpy.Merge_management function to merge roughly ~1500 shapefiles together. When I tried this with much smaller test runs, it ran perfectly. Now ...
4
votes
2answers
200 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 ...
2
votes
1answer
251 views

Debugging ERROR 000725: Output Dataset: Dataset … already exists?

Using ArcGIS 10.2 Desktop I am trying to run a Merge function by Arcpy as # Set environment settings env.workspace = "E:\\GIS\\ROR" path = "E:\\GIS\\Data\\" featureClass = "band-tailed_pigeon.shp" ...
0
votes
3answers
107 views

Merging XYZ's in ArcGIS Desktop?

I have like 6 .xyz files that are to be included in a single map (they sort of overlap). However, I'd like to save time and automatically merge them together through python code into one .XYZ before ...
1
vote
1answer
103 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
49 views

How to merge new values only?

Using ArcGIS 10.3 Desktop. We have a single feature class within our geodatabase which is a merge of all the other feature classes in the geodatabase. I would like to build a model that we can run ...
2
votes
3answers
89 views

Dissolve without removing interior lines in ArcMap? [duplicate]

I'm fairly new to GIS and I'm having an issue that I hope someone can help me resolve? Basically, what I'm trying to do is merge features based on a single attribute so that my table no longer ...