To combine two or more parts into a larger whole.

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3
votes
2answers
512 views

In PostGIS, how do I merge a multilinestring into a single linestring, keeping the pieces in proper order?

I have a multilinestring made up of several pieces, some of which are facing the wrong direction. (Accessible here: http://pastebin.com/89Zcixv5 ) I think what I'm looking for is some utilization of ...
3
votes
2answers
219 views

Merge two geodatabases with identical structure

I'm using an ArcGIS addon which stores all created data (shapes and tables) in a gdb. The addon is made for single user use but to safe time I want to split the work with someone else. After that I ...
3
votes
2answers
921 views

How to join lines in QGIS for later using “lines to poly”?

After successfully merging lines (using snapping) with merge_selected_features i got nice result - one merged line. Next thing was to make polygon from created merged line. Result is not nice - it ...
3
votes
0answers
86 views

Merge Raster Layer Specific Order in Graphic Modeler

I'm using the Graphic Modeler/Processing Modeler to automate a process. The last step in this process is Merging three different Raster Layers. I'm using the "Merge Raster Layers" from Saga 2.0.8. ...
2
votes
3answers
1k views

Can ArcGIS only merge two shapefiles each time?

I need to merge multiple point shapefiles (in the same directory) into one point shapefile. After inputting these shapefiles and merging it, I found the final output only contained the data from two ...
2
votes
3answers
99 views

Can QGIS merge CSV files with different colums? [closed]

I am trying to merge a month's worth of daily CSV files without using ArcGIS. Each file has ~25,000 entries so this is a high data load project. Sample data can be found here. Note that we are using ...
2
votes
3answers
260 views

Merge 30000 polygon shapefiiles in a logical manner in ArcGIS model Builder

I have 30000 shapefiles (a1.shp to a30000.shp). They are all polygons. Each polygons has one and only one polygon feature in it. I need to Merge the polygons into 1000 shapefiles. My output would be ...
2
votes
2answers
195 views

merging raster aerials in QGIS issue

I follow the instructions here very closely and yet every time QGIS gets caught in a loop. It takes a few small rasters totally less than 100mb and creates HUGE gb files and will not stop until ...
2
votes
1answer
75 views

Merging ShapeFiles with QGIS for UK counties

I want to draw a map for all the counties of the UK including Northern Ireland. Since I cannot find a source of counties including both Northern Ireland and Britain, I tried to merge two shapefiles ...
2
votes
3answers
520 views

How can I convert a set of ShapeFiles to an OSM file?

How can I convert a set of ShapeFiles to an OSM file?
2
votes
3answers
416 views

Merging multiple rasters with the SAME spatial extent

So I began with lidar elevation data 1m resolution, and I performed a terrain analysis to extract specific ranges of elevation from the raster (1st picture is 0-1m elevation, 2nd picture is 1-2m ...
2
votes
1answer
167 views

Merge from arcpy.ListTables() producing duplicate rows?

I was trying to manually merge file geodatabase tables and was getting Null values for the output file rows and decided to write a python script to merge the files. Here's my script: import arcpy ...
2
votes
2answers
861 views

How to merge dbf files in Python or arcpy?

I have over one hundred dbf files to merge. Each of files have two columns: ID and another field which differs from one file to another. I want to merge those fields based on ID such that each raw ...
2
votes
2answers
129 views

What is the difference between mosaicking and merging?

What is the difference betweem image Mosaicking and Merging?
2
votes
1answer
4k views

How to combine (join?) two overlapping polygons to determine combined area they cover?

How do I combine (join?) two overlapping polygons to determine the combined area they cover in ArcGIS 10? I am sure the Geoprocessing tools can do it, but just how eludes me.
2
votes
1answer
149 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 ...
2
votes
1answer
51 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 ...
2
votes
1answer
81 views

Merge Shapefiles using a loop

I'm a new user of ArcMap. And I'm not good at programming language. There are the following shapefiles in workspace. L01-1983_01.shp L01-1983_02.shp ... L01-1983_46.shp L01-1983_47.shp ...
2
votes
2answers
213 views

Merge point features within a given radius [duplicate]

I have a file in QGIS with 5000 points. Some of the points are really close to each other (5m). How can I cluster the point features to one point feature if they are within 5m? The new points should ...
2
votes
1answer
797 views

merge raster images: error message procedure not found

I am using QGIS 1.8.0. Whenever I try to merge raster images I get the following error message: Traceback (most recent call last): File "C:\PROGRA~1\Quantum GIS Lisboa\bin\gdal_merge.py", line 36, ...
2
votes
2answers
1k views

Modelbuilder: Needing to input multiple featureclasses into merge tool

So I have 490 point fc's in a single directory with uniform spatial features, field names/datatypes. I'm trying to figure out how to consecutively input the first seven fc's into the merge tool, ...
2
votes
1answer
25 views

What is FME equivalent to ArcGIS Dissolve?

I am trying to dissolve polygons that are spread out across a region. ArcMap's ModelBuilder will dissolve these polygons into a single, multi-part feature. How can I get FME to do this same thing? I ...
2
votes
2answers
94 views

Merging linestrings in QGIS using PostgreSQL and PostGIS

I've to merge all linestrings from a PostgreSQL table "river" where not more than two start-/endpoints are overlapping. In the illustration below I use a "M" to mark all linestrings that needs to be ...
2
votes
1answer
74 views

How to merge/combine several tables in geodatabase into one table using ModelBuilder?

I have over 50 csv files that have the same data structure and I need to merge them into one table. As I need to build a model I have successfully imported all the files into a File Geodatabase. ...
2
votes
1answer
73 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 ...
2
votes
1answer
61 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 ...
2
votes
2answers
93 views

Merge layers and fill gaps

I have 14 layers, which are polygons. They represent the channel of a river at different periods. I need to fill the gaps that exist once I overlay the polygons, but I can't change the properties of ...
2
votes
2answers
136 views

How to merge same long lat points with different data into a unique one?

I have a layer where there is more than 1 feature for a same object. Imagine i have a layer called signals. There can be up to 10 features in the same place (long/lat) for a unique signal but the ...
2
votes
1answer
56 views

Combining many polygons from multiple datasets into one raster

I am a beginner in ArcGIS. I have a query regarding merging many polygons to form one big polygon, and then rasterizing it. The polygons are from varied datasets and represent different ...
2
votes
3answers
246 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 ...
2
votes
1answer
511 views

Merge feature classes in feature datasets

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 ...
2
votes
1answer
586 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 ...
2
votes
2answers
1k views

Merge lines with the same 'name' attribute on QGIS?

I have a shapefile with a few thousand lines, each is a street segment. I'd like to merge all features with the same 'streetName' attribute into a single attribute. I only really care about the name ...
2
votes
1answer
443 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 ...
2
votes
3answers
222 views

How can I merge a LOT of polylines automatically?

I have lots of MultiPolylines, three-dimensional arrays where the bottom level is an array of lat/lngs, the second level is an array of those points (a single polyline), and the top level is the group ...
2
votes
1answer
552 views

Why does Merge then Dissolve return ERROR 000732: Input Features: Dataset … does not exist or is not supported?

I'm not sure why I'm running into this problem. I thought it might have something to do with the merged file being locked or open, but I don't see a "LOCK" file being created in Windows Explorer. ...
2
votes
2answers
2k views

Add data from table into feature class

I have a feature class with mostly unpopulated fields (ArcMap Standard 10.1, in an SDE database, with attachments). I exported the attribute table as a .csv file so that a co-worker without access to ...
2
votes
1answer
55 views

LiDAR data download, merge and mosaic (Minnesota state)

I have been using the toolbox found here to download LiDAR data for MN (Minnesota-US). The tool is very convenient for downloading multiple tiles but the merge/mosaic function of the tool is ...
2
votes
1answer
61 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 ...
2
votes
1answer
84 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*": ...
2
votes
1answer
54 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
128 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 ...
2
votes
1answer
83 views

QGIS: How to merge single polygons to multi part polygons by maximum distances?

I have a polygon layer with a land-use class and ID for every polygon. How can I merge polygons (into multi part polygon) which do not adjoin, but are not further than x meters apart from each other. ...
2
votes
2answers
53 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 ...
2
votes
1answer
159 views

ArcGIS “Merge” tool is slower on arcpy than when starts it with ArcGIS interface

I am writing python script on ArcGIS 10.2.2 and found some strange bug. I use merge tool to process 498 shape files (they are located on a hard drive). Using arcpy script it takes 6 minutes, but when ...
2
votes
1answer
915 views

How to merge hundreds of vector layers and sum attributes in QGIS?

I'm still at a fairly beginner level with QGIS and I've been banging my head against the wall trying to figure this out, so I would like to turn here for the internetz help. I am trying to construct ...
2
votes
1answer
120 views

Averaging XY points locations if in close proximity automatically over a large dataset in R

I have a point dataset (XYZ values) containing a few million points covering a 5km x 5km extent representing maxima locations. However there a great deal of these points which exist in 0.5m of others. ...
2
votes
1answer
226 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 ...
2
votes
4answers
806 views

Merge large number of polygons using QGIS

I have a series of polygons that are the output of another GIS program - I need to merge the polygons into a single polygon. I have tried a couple of different methods with no luck. I have tried to ...
2
votes
1answer
102 views

How do I create smaller maps for publishing from multiple tiles representing a large map using QGIS?

I am completely new to cartography and QGIS - I'm a writer, editor and acceptable designer (Adobe Creative Suite). I wish to produce PDF tour guides featuring maps that display a route. One version ...