To combine two or more parts into a larger whole.

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1answer
12 views

Error when using viewshed analyis plugin with merged shapefile

I am using Qgis 2.12Lyon and try to run a viewshed analysis to show the intervisibility between several points in more than one shapefile. I have a digital elevation model (.tif) which is projected ...
3
votes
3answers
57 views

How to create a line with all attribute information of the original GPX points?

I am trying to make a shapefile line contain all the data that the GPX file has. So i load the gpx file into Qgis, (prompts me for tracks, waypoints, trackpoints, routes, etc) When i choose ...
2
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0answers
87 views

Merge n number of adjacent polygons [on hold]

I have over 17,000 individual polygons. I want to merge two adjacent polygons so that I finish with approximately 8,500 polygons. The polygons need to be merged based on location, merge two adjacent ...
3
votes
2answers
57 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 ...
1
vote
1answer
18 views

How to merge raster with FME with different spatial resulution?

I have two sets of raster (tiff, aerial photos) which I want to merge to one raster file with FME. The two sets have different spatial resolutions. Set A has a better resolution as B. The two set do ...
1
vote
1answer
19 views

Merging CAD and .mdb table into a feature class

I have cad file (.dwg) which contains the geometry and the attributes are in the tables of access (.mdb) database. The common FIELD in both of them is "HANDLE". How do I convert these into a ...
0
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1answer
24 views

Merge rule missing in ArcCatalog?

When trying to use the 'Merge' tool in ArcCatalog [EDIT (v. 10.3.1)], I am not seeing all of the merge rules- the options I can select are different than those outlined in the tool's 'About' section. ...
1
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1answer
40 views

Merge polygons in the same shape file based on attributes, ArcGIS or ArcPy

I have a shapefile of polygons. I do not want any polygons with an area less than 25. For polygons with an area less than 25 I want to merge them with another polygon with an area greater than 25 that ...
0
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1answer
54 views

PostGIS Get the POINT that is x meters away from a fixed point on the route (LINESTRING)

We have a route network stored in the routes table (LINESTRINGs). Basically every sedment (between two vertexes) is inserted as a separate row in this table. Among that we have a locations table ...
3
votes
2answers
58 views

merge dbf files - without using arcpy?

I have ~7,000 2 line dbf files (zonal stats output) that I would like merged into one table, all the same format. I have used the arcpy merge tool, as seen below. #merge tables together ...
1
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0answers
16 views

Moving feature classes between FGDB's creates unknown topology errors [closed]

I am attempting to merge together multiple large feature classes from different FDGB's into a single feature class and am getting unknown topology errors when checking for gap and overlap rules. I ...
5
votes
1answer
88 views

Merging .asc files = “The command line is too long”

Having problems merging LiDAR .asc folder files to produce a single GeoTiff file. I have followed various instructions e.g. the 2 methods of selecting input files for merging .asc files using ...
1
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0answers
35 views

How to create a single feature/segment from connected line segments

I want these 3 connected line segments to be a single feature/segment. I used dissolve and unsplit tools but I am not getting desired output. I dont want it done manually with merge tool, because ...
2
votes
0answers
26 views

Keys for merging US state/county ANSI's with GADM Unique identifiers?

I've got county-level data from USDA NASS, and I want to merge it with gridded climate data. A preliminary step is the associate the counties with the coordinates of their centroids. If I merge by ...
1
vote
1answer
35 views

Finding and merging lines that touch in PostGIS?

I would like to select and merge segments that touch like in the image below. My table contains single segments with their own id (shown in the figure), I just want to isolate single "group" of ...
4
votes
1answer
33 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
votes
0answers
25 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
34 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
25 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
107 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
63 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
51 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
67 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
votes
0answers
21 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
17 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
21 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
110 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
17 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
31 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
35 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
63 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
66 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
67 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
40 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 ...
1
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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
79 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
87 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
84 views

Using lasmerge in QGIS 2.8.3 is not working

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
51 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
34 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
38 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
69 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
108 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
33 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
votes
0answers
25 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 ...
1
vote
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
45 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
127 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
91 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 ...