Questions tagged [merge]

To combine two or more parts into a larger whole.

Filter by
Sorted by
Tagged with
3
votes
2answers
2k views

Stratified Random Sampling with large dataset in ArcGIS?

I want to create a Stratified Random Sample with a land cover classification map. The purpose for the Stratrified Random Sample is to produce an Accuracy Assessment. I am using ArcGIS 10.2 with access ...
3
votes
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 ...
3
votes
1answer
4k views

Merge two geojson files

I have a global json files about countries' boundaries but the Russia is in two parts (two polygons). I want to merge the two parts in one, without the boundary at the middle. Is there a way to "...
3
votes
1answer
3k views

How to “Merge Selected Features” with python?

I have been looking for the answer to this question for some time now, but can't seem to find it! My problem is straight forward: I have one layer It contains lots of features (only polygons), say ...
3
votes
3answers
175 views

Automated way to join

I have river networks (polyline) of several adjacent countries as shapefiles that almost match up at the borders, but not quite. Is there any way to automatically connect them to a consecutive river ...
3
votes
1answer
1k views

Merge selected features and programming

I have a shapefile with UK districts and unitary authorities. In the past, using commuting patterns, I worked out a new geography which is close to travel to work areas. I now would like to create a ...
3
votes
1answer
642 views

How to combine lines from different sources reperesenting the same road network but with slightly different geometry?

I have got two layers of polylines which represent the same road network but they are from different sources and have different geometry. The two layers are mostly the same tracks with larger or ...
3
votes
1answer
45 views

Merging or joining two tables with some matching columns in QGIS to calclulate unique values

I have two tables (A and B) that display the presence or absence of a species within a polygon and within each polygons associated buffer layer. The purpose of the buffer layer is to account for a ...
3
votes
1answer
44 views

Gaps in polygon after merging

When I use the merge tool on this polygon mesh, I end up with a multipart polygon with large gaps. Before this, I was getting an error when trying to run a merge or dissolve because of "Polygons with ...
3
votes
2answers
77 views

Joining the attributes of two nearly congruent streetnetworks (lines) in QGIS

I have two streetnetwork layers containing both different attributes, none of them is similar so I can´t do a simple join. Unfortunately they are not congruent, but the line objects are close to each ...
3
votes
1answer
175 views

PyQGIS code for Merge Vector Layers

I've been trying to automate the merge vector layers via PyQGIS but I can't seem to get it right. This is my code: import os import processing loc = r"C:\Users\loc" os.chdir(loc) shapelist = os....
3
votes
2answers
54 views

Are there different definitions of “merge”?

The merge tool in ArcGIS ArcToolbox is used to combine two layers, but it seems that there is also a Merge option under Modify Features that is used to combine and dissolve adjacent features within a ...
3
votes
1answer
54 views

Copy elevation from points to line

I have a vector line, but it has no z-dimension. I have some points along the line, which have the elevation included. Can I add the elevation from the points to the line at that specific point? ...
3
votes
1answer
67 views

Assigning existing geometry to another layer in QGIS?

I have several line layers that run parallel to each other and would like to assign the geometry of the central line to all the others without losing information in the attribute tables. Is there a ...
3
votes
1answer
293 views

Problem merging multiple paths of KML files (saved as SHP) in QGIS

I have several KML files (trail01.kml, trail02.kml etc.) each containing multiple paths (about 30) created in Google Earth. I have opened them in QGIS and saved them as SHP (trail01.shp, trail02.shp ...
3
votes
1answer
524 views

R - Batch Merge Line Shapefiles

I am trying to merge all road data from the OS Open Map Local file, to create a single line shapefile of all the roads in the UK. I will then use this data to create huff catchments. I would like to ...
3
votes
1answer
208 views

Joining postcodes to coordinates in a .csv file

I have a .csv of land registry sales data that includes full addresses and postcodes. I'm trying to geocode all the data so that I can plot it in QGIS but my issue is that I have 2 million records ...
3
votes
1answer
109 views

Representing multiple polylines in unique vector layer?

I have imported a layer which contains a lot of lines. They overlap each other in a cross kind of pattern. When zoomed out it can look like this: When zooming in on one of the broader lines it looks ...
3
votes
1answer
384 views

Merging shapefiles with DBF file, error with duplicate values

When I try to merge my household data file in a .dbf format with my shapefile by using key variable, I get the following error message: Chosen table merge key field IL contains undefined or ...
3
votes
1answer
45 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
1answer
2k 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" ...
3
votes
1answer
590 views

Iterators in model builder - merging nested files with same filename ending

I am trying to merge files that are nested in different folders by their file names. For example folder 1 contains up to 100 subfolders that each contain a set of shapefiles: subfolder1_A.shp, ...
3
votes
1answer
684 views

Merge 2 Pointlayers with same coordinates but different attributes in QGIS?

I have two layers with points who have exactly the same coordinates but different attribute fields. I would like to merge the tow layers so that I only have one point at each location who has the ...
3
votes
1answer
851 views

Merging .dbf Tables in Python w/o merging all fields of same name

I'd like to merge several tables together using Python. They all have the same field names: "TIME", "X", "Y", and "VALUE". I would like the "VALUE" fields to remain separate when merged, so that the ...
3
votes
2answers
860 views

Merging DEMs of different grid size

I'm trying to merge two grids with different cell size. One has a cell size of 10m and the other 50m. The 10m one covers a subarea of the 50m one. I know that the most accurate one is the 10m one and ...
3
votes
1answer
1k views

QGIS 2.2 Raster Merge losing color data

I'm trying to merge a couple of GeoTiff maps using Raster > Miscellaneous > Merge but the merge is only coming out in grayscale. The geotifs are using palettes color. How do I get the merge to keep ...
3
votes
1answer
4k views

Merge multiple feature datasets while maintaining shapefiles for respective point, line, and polygon files nested ArcGIS

I've been doing some digging and a few days of playing around with my data in ArcInfo but I haven't been able to find a solution to merging datasets, which consist of many different point, line, and ...
3
votes
1answer
3k views

How to merge several google map images into one?

I want to have a high resolution aerial photo of a catchment area. I took some images from google maps and georeferenzed these and saved them as a layer file. but how can I merge them now that I have ...
3
votes
1answer
296 views

shapefile batch clip and merge combined

I have two shapefiles, one is polyline, the other polygon. For each polygon I would like to clip the polyline vectors inside. Using arcpy I already found part of a possible solution: https://gis....
3
votes
2answers
95 views

Merge shapefiles with common field

I'm trying to merge several shapefile layers. Each of the layers has three attributes: CGRSName: Name of the grid cell (same for each shapefile) CGRSType: explains the type of grid (not important ...
3
votes
1answer
59 views

How do I split subjacent lines and merge attributes in QGIS [duplicate]

I have 2 vector line layers. They are subjacent, so one of them is exactly on top of the other but the features have different nodes and attributes. My goal is to create labels and descriptions for ...
3
votes
3answers
78 views

Dissolving polygons when only relationship is spatial location?

I have a feature class with parcel information; some of the parcels have roads included while others do not. When a parcel has a road included there is always a matching parcel without the road ...
3
votes
1answer
742 views

Merging neighbouring polygons with QGIS

I have a polygon layer that consists of many different polygons; some of them are neighbouring and some of them are not. How could I merge the neighbouring polygons?
3
votes
1answer
466 views

Merging overlapping polygons with original polygons in QGIS

I have a large vector shapefile dataset containing polygons, many of which overlap. I want to assign each overlapping section to one of the original overlapping polygons. E.g. if polygon A overlaps ...
3
votes
1answer
439 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
votes
1answer
338 views

Merging large amount of adjacent polygons based on attribute field using ArcGIS Desktop?

I have overlaid two shapefiles with the tool "Identity". Thus thousands of slivers were created. I eliminated slivers that are smaller than a certain area. But there are still several thousands left....
3
votes
1answer
495 views

ArcObjects c# .Net Merge with Geoprocessing?

I'm trying to run the Merge tool using ArcObjects c# .Net. I'm fairly new to the skill but I have been able to run other tools such as Buffer and Points to Line. However, I have met my match with ...
3
votes
1answer
618 views

Raster merge leaves gap where one file has no data

So I gave up on using the Raster|Misc|Merge... command in QGIS because it always crashes. I tried using the merge tool from the GDAL/OGR Processing Toolbox instead. That runs OK, but it puts a gap ...
3
votes
1answer
452 views

Combine/Convert many parallel lines to one single line?

I am working with railway generalization by using ArcGIS ModelBuilder. I need "Combine/Convert" many parallel lines together into one where ever they are close to each other. Beside use Merge Divided ...
3
votes
1answer
106 views

Cannot select SHP format as saved format after merge two layers QGIS 2.16 and 2.18

I was using 2.16 version and everything was alright, I could merge two layers via Vector - Data Management - Merge and use .shp format as saved output format. Unfortunately my working laptop was ...
3
votes
1answer
284 views

Using QGIS to prepare/execute fuzzy merge of two data sets with spatially coincident features?

I have two datasets that I need to prepare for merging: both are of a set of POI in the UK (places of worship) which have been generated by two different sources. There are around 50,000 points total ...
3
votes
1answer
462 views

How to aggregate pixel in gdal python?

I want to aggregate pixel in raster file like Arcgis(picture). Is this fuction possible in gdal(python) or geotools? And I want to add option to select representative value(ex.sum, max, average..)
3
votes
1answer
878 views

Merge raster layers with NoData cells

I have two elevation rasters that I want to combine into an output like the one shown in the image - Expected result. I tried that using Gdal: Merge, but it doesn't take into account my NoData cells ...
3
votes
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
votes
1answer
464 views

Export to CSV a list of addresses that fall within a shapefile?

I currently have a shapefile (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 ...
3
votes
1answer
135 views

Issues merging divided carriageways using Skeletron

I would like to merge divided roads from openstreetmap, and a tool that keeps getting mentioned is Skeletron, for example here. I tried the tool on a small geographic area, and the results are fairly ...
3
votes
1answer
670 views

Error message trying to merge Shapefiles in Python

I try to merge all Shapefiles from one folder together into one, using this: shapeList = arcpy.ListFeatureClasses() print shapeList for fc in shapeList: if fc == "*domain*": arcpy....
3
votes
1answer
641 views

FieldMap in Arcpy Merge for Selected Fields Only

I am trying to use FieldMap in arcpy to merge only a few of the same fields from 8 feature classes. There are many different fields in all of the different feature classes, but I have identified the 9 ...
3
votes
1answer
270 views

Merging different Landsat scenes in Grass GIS?

I am new to Grass GIS. I have 17 scenes from Landsat8 covering an area. I have created color infrared images of bands 5,4,3 and now I want to merge all scenes into a mosaic, for further analysis. I ...
3
votes
1answer
210 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 ...