To combine two or more parts into a larger whole.

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1answer
24 views

Does CartoDB support the SQL MERGE command?

I am developing a mechanism that uploads records to cartodb - first by importing the records to a new table, and then insert the records from the new table to an existing table. The problem is that ...
1
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1answer
48 views

Strategies for managing (and ultimately merging) duplicate business locations in a spatial database

I am working on a project right now that involves using multiple (very large) "location directories" to identify with the highest possible inclusiveness, a diverse set of business locations. These ...
-2
votes
1answer
30 views

Merging bulk data in 10.2 ArcGIS

I have to merge 50 datasets. All datasets have same feature classes. please suggest me fastest way. append, merge, load, all methods will take time. please suggest me fastest way.
2
votes
1answer
44 views

Calculating Distances Between Geometry Columns of Differing SRIDs

I am attempting a relatively simple task but have been running into trouble. I have two tables, one which has lat and lon points which were geocoded using google (SRID 3857) and another table which ...
0
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0answers
9 views

merge rasters using mosaic to new raster - wrong output

I am attempting to merge two raster datasets into one output dataset. I am using the Mosaic to New Raster tool. Unfortunately, the output does not display the same categories as the original input ...
2
votes
1answer
124 views

Merge tif files with python

I'm also having problems with running gdal_merge.py within another python script and I cannot run it. I already checked a similar problem here. My example is as follows: First I set my workspace and ...
3
votes
2answers
8k views

How to Merge/Dissolve Polygons By Common Attribute Field in QGIS?

I have joined corresponding Local Enterprise Partnerships table data into a polygon shape file containing UK Local Authorities. How do I Dissolve or Merge the the Local Authorities polygons by ...
1
vote
1answer
148 views

ArcGIS10.2 Data Merge error: 000732

I am running python in the ArcGIS python window. ArcGIS shows error message when trying data merge from arcpy. File "", line 1, in File "c:\program files ...
1
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1answer
1k 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 ...
1
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1answer
229 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 ...
2
votes
1answer
46 views

Merging ShapeFiles with QGIS for UK counties

I want to draw a map for all the counties of UK including North Ireland. Since I can not find a source of counties including both North Ireland and Britain. I try to merge two shapefiles with QGISfrom ...
0
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2answers
22 views

Combine Community Layer with County Layer in ArcMap?

I have a County shapefile that I am trying to combine with an updated community or jurisdiction shapefile. I have tried Unioin, Merge, and Spatial Join, but am not getting the desired results. The end ...
1
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0answers
29 views

Merge multiple geojson-polygons

Lets say I have a very big image With a polygon in it: I want to polygonize this very big image with gdal polygonize. But the image is too big, so I dont have enough memory to polygonize that ...
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0answers
24 views

Join GeoJson with additional info files

I have a GeoJson-file [1] with multiple polygons exported from OpenStreetMap that will be updated regularly and I want to add additional information (to the properties) from another file [2] (JSON ? ...
2
votes
1answer
98 views

Overlaying lines and aggregating their values for overlapping segments

I have a number of routes (5 in this example data) stored in a SpatialLinesDataFrame called r. These have different origins but all converge on the same destination (Manchester Airport): Each ...
1
vote
2answers
35 views

Merging raster data in QGIS using wildcards

I have a problem merging raster data sets in QGIS, and I have searched various forums, but have not found a solution yet. An "ordinary" merge, for example merging the raster files ...
2
votes
1answer
33 views

ST_LineMerge doesn't return LineString

I want to create a LINESTRING from a MULTILINESTRING. However in the following case ST_MultiLineString is returned: Select ST_GeometryType(ST_LineMerge(ST_AsText(' MULTILINESTRING( (-70.52570888 ...
1
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1answer
25 views

FME - How to merge geometries that they are in a distance of x meters?

I have a CAD file which I import in FME. I have two different geometries. A polygon and a point geometry. Each point geometry has some attributes which I want to pass to the polygon geometry. Both the ...
3
votes
1answer
316 views

How do I merge DEM rasters correctly?

I've been struggling with this problem for awhile. Here is a curvature raster to illustrate the problem. I'm using 10m DEM rasters from the NRCS Data Gateway for a large portion of California. The ...
5
votes
2answers
305 views

Correctly merging DEM rasters and eliminating edge effects

I'm using 10m DEM rasters from the NRCS Data Gateway for a large portion of California. The problem is some strange tiling that appears after merging, but isn't present in the original data (before ...
0
votes
0answers
29 views

How to merge grd files programmatically, ideally in Python?

We currently get LIDAR data from the field in grd format. Sometimes this data is overlapping. This data gets fed into a python program that does some analysis. What I'm after is some way of ...
2
votes
0answers
42 views

Create polygons from many small. Expand to include space between

I'm just a programmer without GIS-skills as such. Hence this question: Intro: I have a lot of polygons; actually each private-owned real estate in my country. I also have "counties" as polygons. ...
0
votes
2answers
51 views

python conditional statement to allow either two inputs or only one input going into a merge

I have a model builder process that I am converting to python for additional editing. In the process I have both a point and line features(input variables) being buffered and then the resulting ...
1
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0answers
24 views

QGIS how to merge a linestring layer and a point layer into a multigeometry layer

I have two layers: Layer1 is point type. Layer2 is linestring type. I need to obtain one unique layer merging both layers. Of course, it will need to be multigeometry type.
6
votes
3answers
1k views

Which is more efficient process in ModelBuilder - Merge/Dissolve or Union/Dissolve?

I'm creating a model which combines four very large files and dissolves them. At the moment, my workflow uses the Merge tool and then the Dissolve tool. However, I was wondering if using the Union ...
0
votes
1answer
65 views

Merging polygon and line shapefiles into one using QGIS?

I have two shapefiles: One is a line feature of the rivers and waterways of London, the other is a polygon feature of the reservoirs, lakes and ponds of the same area. Is it possible please to merge ...
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votes
1answer
69 views

Unable to merge two shapefiles (created from text files) using ArcPy? [closed]

I am trying to merge 2 shapefiles together created from 2 text files. I am new to python and managed to get the textfiles into shapefiles, however, when trying to merge the two newly created ...
0
votes
2answers
45 views

Mosaic To New Raster - Raster Cells Shift

I have wind raster datasets for the U.S. that are organized by state and I would like to merge these datasets to get one map of the whole U.S. I am new to using ArcGIS and through some research I ...
4
votes
2answers
1k views

Merge an entire Geodatabase in ESRI ModelBuilder

How can I merge an entire Geodatabase in the ESRI (ArcView) ModelBuilder? I have several FeatureClasses created into the GDB and in the model I plan to merge them all. Right now I have imported all ...
1
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0answers
36 views

merge polygons of single feature QGIS

I am new to QGIS and have done some research on this topic before posting but not sure I found an answer. I have one feature that has multiple polygons (islands of a nation). In reality, there is ...
2
votes
0answers
41 views

How to union linestring data distributed on multiple layers?

I have four shapefiles. Each contains a linestring as shown in the image. Each shapefile is represented as its own layer in QGIS. I would like to union these linestrings into one polygon which ...
0
votes
1answer
48 views

Merge Feature Records with Identical Parameters in Two Different Fields using ArcPy or SQL [SOLVED]

I'm trying to merge feature records based on identical parameters in two different fields using Python or SQL. I have a polygon feature class with ~800 records, that I've intersected with another ...
2
votes
2answers
49 views

Pyqgis How to merge all the active layers? or layers in the registry?

I was wondering if there is a way to merge multiple layers. I actually would like to merge all layers in the registry programmatically, all of them are point layers and have the same fields. I have ...
0
votes
1answer
23 views

How to join multiple lines (branches of a large stream network)

I've generated a channel/stream network based on a DEM, but each branch of the network is split into very small lines. I'd like to have the network divided into as few separate lines as possible, so ...
0
votes
1answer
48 views

Merge two points of two different polygons to get one polygon at the end

I would like to join points from two different features. I already searched for plugins but so far but didn't find one working plugin or solution for my task. So here is a picture of 2 ...
2
votes
1answer
59 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*": ...
1
vote
0answers
25 views

combine multiple geojsons

I have several geojsons which contain polygons. But the polygons are reaching over other geojsons. When I import them into lets say Qgis, the polygons, which are distributed among several geojsons are ...
2
votes
1answer
60 views

Merge multiple bus stops with same name

my question is similar to this one, but it's not answered sufficiently: How to merge points (bus stops) in QGIS manually or programmatically? I have OSM-transit data with bus stops. Some stops have ...
0
votes
1answer
86 views

Merge shapefiles in folders and subfolders with arcpy

I try to merge 20 shapefiles in order to get one shapefile that include all the features. All shapefiles are called "migrashim", and they spread in big folder that divided to a lot of sub folders. ...
0
votes
1answer
66 views

Merge layer files in folders and subfolders with arcpy

I work with arcview 10.3. I try to merge layer files in order to get one layer file that include all the features in the other layer files. All layer files as different names, and they all spread in ...
2
votes
1answer
48 views

Merging Only Selected Lines in ArcGIS for Desktop?

Working in ArcGIS 10.1 for Desktop, is there a way to only merge selected lines from a layer? For example, I want to merge these three red lines (all from one layer).
2
votes
1answer
46 views

Difference between: join, merge and group

Suppose it is desired 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 ...
1
vote
1answer
314 views

JSTS : Union on polygons with holes

Hi all, I'm trying to union two polygons (see above) with JSTS. My first polygon contains an hole, and my second polygon fill partially this hole. The expected result is a unique polygon with two ...
2
votes
3answers
99 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 ...
1
vote
0answers
37 views

QGIS polygon - filling a polygon gap

I do not use Python, I'm afraid. I need to fill in a polygon gap for this map of Scotland. Here is the gap: How do I fill in this gap? I have already tried drawing another polygon inside the gap ...
1
vote
2answers
134 views

Python scripting for feature classes (loop, sort, merge, and replace)

This is what I have to accomplish using a python script for ArcGIS 10.1: Loop through all feature classes and first add a field, then write the name of the feature class into the added field. Merge ...
0
votes
0answers
34 views

Python scripting error (merge)

I've been trying to use this code to add a field to, merge, and sort multiple feature classes: import arcpy, os arcpy.env.workspace = r'W:\S&P\s&p ...
0
votes
1answer
59 views

Merging multiple feature classes into one using Python

So I have feature classes from an ArcGIS database that I renamed using this Python code: But now I have to merge all the feature classes that are output from this into one feature class named ...
1
vote
1answer
17 views

Eliminating pixels of a Merged image

I need to change the value of pixels that where created in an image as a result of merging 2 rasters, this new pixels have a value of 0. The problem is, that there are pixels with 0 in the original ...
2
votes
1answer
834 views

Merging polylines together keeping the attributes of the largest one

I have a set of polygons with polylines running through them. I am trying to assign the polylines the polygon ID that they pass through the most. I have already split the polylines to the polygon ...