To combine two or more parts into a larger whole.

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1answer
184 views

Merge layers (SAGA) ERROR

with QGIS 2.10 it is not possible to merge vector layers with the "Processing-Saga" tool (merge layers). The following error log comes up: Algorithmus Merge layers startet... shapes_tools "Merge ...
0
votes
1answer
18 views

Merging multiple MrSid files in ArcGIS for Desktop?

I've got multiple sid files that make up my county of interest. I need to get all the sid files into one and STILL have the sid file type after merging. Anyone know how to do this in ArcMap 10.2.2?...
2
votes
1answer
487 views

merge rasters with nodata cells

I want to create single attribute table base on multiple overlapping raster. Some raster do not overlap completely but have common areas. In that situation I need the value from other raster while ...
1
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1answer
55 views

ArcGIS - how to join attributes of overlapping polygons

Given two tables each with unique attribute sets, how do I merge the attributes of one layer onto the other, or create a new layer containing the attributes from both? The image shows my two layers: ...
1
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0answers
14 views

Methods on aggregating census tracts for better CV's

I am working on a project that maps out poverty rates (ACS data) by census tract. Many of the tracts have CV's that are just too high for our study and I am hoping for find a sound methodology in ...
1
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1answer
78 views

Merge Shapefiles and Add File Name to Attribute Table

I am trying to merge lots of point shapefiles together to form 1 large shapefile. What i want to be able to do is get the name of each of the point files to appear in the attribute table either during ...
2
votes
0answers
18 views

difference in behavior between merge from SAGA and merge from QGIS geoalgorithms

I'd like to know what I'm doing wrong with the merge algorithms in Python. I have several shapefiles (polygons) ending in 'LNA', 'LNC', 'LDA', and 'LDC', and I'd like to merge them depending on ...
0
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2answers
43 views

Extracting mean elevation values from DEM based on multi-polygon shapefile?

I'm trying to get the overall average elevation for different areas delineated within a polygon. Originally, I converted the Digital Elevation Raster (DEM) to a polygon and tried to merge the ...
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1answer
22 views

Merge external table with GIS SpatialLinesDataFrame file in R for attribute table

I have a SpatialLinesDataFrame file named "Sldf" which lacks attributes for each line (see table of sample data below). I have a separate data.frame (from a .csv) named "fsub" with attributes that I ...
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1answer
31 views

Add information from a raster nc-file to a polygon shapefile

DATA Download from this website the following ZIP file: NUTS_2006_60M_SH.zip and save all the NUTS_RG_60M_2006 files. In what follows I refer to this as "NUTS3 regions". Download from this website ...
4
votes
1answer
30 views

Bands Names QGIS when merging rasters

I have downloaded landsat satellite data, then I merged the 4 bands I am interested in into one file (raster-merge). The problem is that I merged bands 2,3,4 and 8, and in the merged file the bands ...
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0answers
32 views

spatial join field mapping Arcpy, change merge rule

I have a line feature class which represents a stream network. At a confluence of two river segments, I'm joining the stream segments to the point of intersection via spatial join (one to one join). I ...
17
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2answers
25k views

Joining several raster files using QGIS?

I'm new to QGIS. How can I combine multiple raster layers into one layer? The raster images are of different areas with very little overlap. The goal is to bring numerous town plats into one ...
2
votes
1answer
1k views

Merge feature classes in feature datasets using ArcPy?

I'm trying to merge a group of like feature classes which are contained within separate feature datasets. I can merge feature classes within a file geodatabase without having issues by creating a list ...
5
votes
1answer
1k 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 ...
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2answers
31 views

Merging two atributes columns in ArcGIS for Desktop?

I have a shapefile that is a result of a merge between a land use chart (with two gaps) and two files to fill the gaps, but the atributes in the Land Use Chart are designated by "LEG" and in the Gap ...
2
votes
1answer
48 views

Merging raster files produces error in QGIS?

I'm trying to merge (Raster -> Miscellanous -> Merge) four raster files into one. Each file has same CRS and are saved as .tif files. Merge produces error: "The process crashed some time after ...
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1answer
36 views

Merge Natural Earth SQLite country polygons using ogr2ogr and ST_Union

I'm trying to create a map with the world continents (with a few modifications). As a source I use a sqlite file from Natural Earth. I already introduced my modification in the definition of the ...
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2answers
35 views

QGIS error in merging large point shapefiles

While trying to merge 2 large point shapefiles using the merge shapefiles tool under the data management. These point files have over 20Gb and have the same coordinate system. Problem is, that the ...
1
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1answer
45 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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1answer
57 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 ...
0
votes
1answer
21 views

Traces outside polygons after merging several polygons together

I'm using ArcMap 10.3.1 I have a polygon shape file for areas upstream of 5 monitoring sites. I used dissolveand merge to merge all these polygons together. You can download the resulting shape file ...
2
votes
2answers
53 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 ...
3
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1answer
35 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
votes
2answers
57 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 ...
1
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2answers
59 views

Using Python to execute merge of rasters Linux

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 ...
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0answers
58 views

ArcGIS Modelbuilder: Merge features from same layer into one feature

How can I merge two features from the same layer into one feature when using the Model Builder? Outside of the model builder, this can easily be done with the Edit Tool. How can I make the same ...
3
votes
1answer
62 views

How can I merge 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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0answers
32 views

How can I export to CSV a list of addresses that fall within a shape file?

I currently have a shape file (KML, but I also have it in other formats as well) that outlines neighborhoods within a city. I also have a list of vacant property addresses in CSV. I'm currently ...
4
votes
1answer
231 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
3answers
83 views

Merging tif images into a single GeoTiff with QGIS

For this example, I have 3 tif images that are tiles. They fit together to form a single image. I load the 3 images into QGIS and it merges them directly and I see my completed image. The problem ...
0
votes
1answer
25 views

How to merge rasters with the same but unequal cell size in ArcMap?

I'm trying to merge raster tiles that all have the same, but unequal cell size (X: 2,8, Y: 2,9). When I use the Mosaic To New Raster tool, I can enter ONE cell size which either results in a raster ...
2
votes
1answer
30 views

Wrong calculation of line start and end XY coordinates of a merged line- how can I fix this?

I have a feature class containing several rivers, which are derived from merging individual river segments to make a continuous line. They have been merged using the editor tool. I have calculated ...
2
votes
4answers
102 views

merge overlapping polygons with spatialite

The green points, buffered by one of the point attributes, should result in the three areas outlined in red (a table with three rows): I'd like to do it in spatialite. How can I do that? If it's ...
2
votes
1answer
406 views

Shapes not matching number of records

I am trying to merge features (polygons) from 7 subregions in ArcGIS (v10.x). Merge goes fine but when I do any other process on it (e.g. Adding a field, calculations etc), the merged file is ...
1
vote
1answer
45 views

Merge points from multiple features that share common attribute

I have several point feature classes that all share similar attribute structure. How might I extract the points from all 9 feature classes that share a specific attribute? Background: There are 9 ...
1
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1answer
32 views

How to append OS MasterMap Feature Class to the Feature class in PostgreSQL database

I have my Enterprise Geodatabase as PostgreSQL. I want to keep OS MasterMap data on the Geodatabase and would like to update it whenever a new tile is downloaded. However, I am struggling to find a ...
2
votes
0answers
59 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 ...
1
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1answer
126 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 '...
0
votes
1answer
124 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 ...
0
votes
0answers
50 views

Layer stacking many images using Python and Erdas Imagine Spatial Modeler

I have downloaded huge amounts of Sentinel 2 data to cover a large area of the Himalayas and need to layer stack each tile. I have decided to use Python to do this using the LayerStack tool from Erdas ...
1
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0answers
50 views

Changing order layers are displayed in using MMQGIS?

I am dealing with hundreds of different layers, all of which have one of 6 names - not by choice, that's just the way they show up when I import them. I am trying to merge all those with the same ...
2
votes
1answer
60 views

Merging polygons

I am trying to merge together two polygons to create a polygon of the whole UK. However, I can't seem to select more than one polygon. Also it seems to be random as to which polygon will be selected. ...
3
votes
1answer
92 views

Automated merge of polygons up to a limit

I have a polygon feature class with a field, let's say it's population. I need to find an automated way to merge these polygons up to a given population number. E.g. I have polygons with population ...
1
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0answers
52 views

Layer Stack 6 Landsat8 bands

I have 6 images from Landsat 8 (Green,Red,NIR,SWIR1,SWIR2,NDVI). When I want to layerstack them with "Merge" I always get a result tif which is just black and white, however I can see that all 6 bands ...
2
votes
1answer
49 views

Merging and splitting raster files in QGIS

I have four .HGT topography tiles (tile1,tile2,tile3,tile4 in the photo below). They are in geographic coordinate system. I would like to merge those four tiles, and then from that merged raster layer ...
1
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1answer
48 views

PostGIS: how to merge contiguous features sharing same attributes values?

I have a big postgis table storing line features. I woud like to merge features that are both connected to eachother and have given attribute values identical. Here is below an example of what I'd ...
2
votes
2answers
65 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 ...
2
votes
0answers
42 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 ...
1
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0answers
55 views

Align Geotiff images in Qgis

I generated 3 drone maps of one area. The individual images were stitched using dronedeploy. Each map has some overlap with others. I imported all 3 geotiffs as rasters in Qgis and overlay them. ...