To combine two or more parts into a larger whole.
2
votes
2answers
68 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 ...
2
votes
2answers
52 views
Combining edits from multiple Geodatabases into a Master Geodatabase
Is there a way to automate combining edits from multiple, single project geodatabases into a master geodatabase based off the date the edits were made without creating duplicated of the same project ...
0
votes
2answers
37 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 ...
0
votes
2answers
45 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 ...
2
votes
1answer
83 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 ...
1
vote
1answer
61 views
Merge artifacts and flow accumulation
I've been struggling with this problem for awhile.
Here is a curvature raster to illustrate the problem http://i.imgur.com/IIjYAov.jpg
I'm using 10m DEM rasters from the NRCS Data Gateway for a large ...
1
vote
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
vote
1answer
204 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
vote
1answer
77 views
Merge two vector layers with different granularity
Beginner at QGIS here.
I have two vector layers. One represents country boundaries for the whole world. The other one represents region boundaries, but only for OECD countries.
I would like to ...
0
votes
1answer
36 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 ...
0
votes
1answer
70 views
Make hangs when attempting to build zip code TopJSON file on Mac OS X
Thanks so much to all involved with the us-atlas project. I am learning how to use d3, leaflet and other tools to make maps and this is really helpful.
I have grabbed files from the us-atlas project ...
3
votes
0answers
64 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
0answers
38 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.
...
2
votes
0answers
36 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 ...
2
votes
0answers
29 views
Trouble merging 2 rasters using qgis
I am trying to merge two rasters using the "merge" tool on Qgis 2.6.
Qgis does complete the process, but the resulting image only shows one of the two rasters with the rest of the extent with really ...
2
votes
0answers
120 views
PostGIS: Merge any and all adjacent polygons
I would like to do adjacency tests on a parcel (polygons) layer and merge them if they fit certain criteria (could be size). Per the picture below, I would like to merge polygons 1,2,3 and 4, but not ...
2
votes
0answers
31 views
Merging Feature Classes and keeping the metadata
Is there a way that while merging two feature classes we can keep the metadata?
We are merging feature classes with templates so we can import specific fields into our data.
Is there a way to keep ...
2
votes
0answers
99 views
Merge Raster Layers with Raster Calculator
I am looking to merge three raster layers together, we are only allowed to use the Raster Calculator tool in Spatial Analyst, ArcToolBox.
Using ArcMap 10.2
2
votes
0answers
128 views
Failing to merge rasters in QGIS
I am new to QGIS but have some familiarity with other GIS software (namely ArcGIS). I want to merge a number of LiDAR digital elevation model (DEM) tiles (specifically, 30 individual tiles) to ...
2
votes
0answers
17 views
Processing Toolbox, avoid using empty layer
I have a process (on the processing Toolbox) I need to reproject and merge two layers (result of previous operations). Sometimes, one of these layers will be empty, in that case it is not necessary to ...
2
votes
0answers
57 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 ...
2
votes
0answers
102 views
How can I merge adjacent polygons and return all (adjacent and not adjacent) as Multipolygon?
I have a postgres database with administrative boundaries and their geometry.
Each of those boundaries have an ident number.
What I want to achieve:
First I want to select all rows which are ...
2
votes
0answers
144 views
Joining nearest neighbor small polygons using R
The figure shows a plot of numerous polygons (zoom in) made from a raster file by
require(sp)
require(raster)
pol100 <- rasterToPolygons(r, fun=function(x){x==1}, dissolve=FALSE)
There polygon ...
2
votes
0answers
188 views
Image classification for a study site falling over two adjacent Landsat 8 scenes (qGIS or ArcGIS)
This question concerns work-flow rather than specific methodological problems.
I will be using GRASS to classify Landsat 8 images to create a vegetation map for a study site that happens to fall over ...
1
vote
0answers
20 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.
1
vote
0answers
30 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 ...
1
vote
0answers
18 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 ...
1
vote
0answers
28 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
0answers
22 views
How to merge DMAs using QGIS — Creating Custom Regions?
What I am trying to do might seem basic, but bear with me as I am just hacking my way through a lot of this space.
What i am trying to do: I am trying to create a new .shp file of custom regions. ...
1
vote
0answers
29 views
How do I change the order layers are displayed in in 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 ...
1
vote
0answers
120 views
How can you calculate the union/merge two polygons in ogr2ogr?
I want to calculate the union/merge two overlapping polygons using ogr2ogr (as I have 300+ to do). I want the output to be the same as you would get if you used the 'Merge shapefiles to one' command ...
1
vote
0answers
96 views
How to keep all the unique columns of the shapefiles after merge?
Writing a script where the user is asked to select a directory which contains Folder_1 and Folder_2, both containing shapefiles and run various algorithms. The basic logical process of the script is:
...
1
vote
0answers
80 views
Merging shapefiles to one, rearrange columns?
I am trying to merge two shapefiles which both contain polygons representing properties in QGIS 2.2.
One problem is that the names of some of the columns in the attribute table differ between the two ...
1
vote
0answers
60 views
Merging parcels but keeping Geometry seperate
I am working on updating a parcel layer we received for a project, and I have duplicate parcelID's for parcels and I have been merging these to create 1 parcel as to not have duplicate ID's.
My ...
1
vote
0answers
301 views
Merge overlapping DEMs with irregular boundaries
I have a 10m DEM covering part of a state, a 20m DEM covering the whole state, and a 90m DEM covering the whole country. How can I merge them together, getting the best quality available in each area?
...
0
votes
0answers
22 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 ...
0
votes
0answers
33 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
0answers
31 views
Intersecting Polygons and merging rows in attribute table
I have 2 polygon shapefiles that I intersected, community boundary and electoral districts (ED). They do not fit into each other, I intersected them so that I would know how much of the smaller ...
0
votes
0answers
62 views
Merging contour lines generated by gridded data
I have a set of gridded data, which I have used to generate contour lines based on separate values in the data.
In the example provided the contour lines shown correlation coefficients. The contours ...
0
votes
0answers
73 views
ArcPy select and merge dropping records from table?
I'm working on a python script for ArcGIS using the arcpy module. I have ArcGIS 10.1 and Python 2.7 on Windows 7 machine and using Notepad ++ and IDLE to run it.
The script selects specific records ...
0
votes
0answers
110 views
QGIS-Merge or create virtual raster files without losing definition?
I am new to QGIS and relatively new to GIS (so please be aware I am not that familiar with a lot of technical terminology).
I am trying to merge several tiff files as either a virtual raster or a ...
0
votes
0answers
39 views
Things to consider while and after merging DEM-Tiles?
In some tutorials it is said that after merging you should stretch the “histogram to full dataset” (also mentioned in the QGIS Training Manual).
Is there anything else you would suggest doing after ...
0
votes
0answers
23 views
Do I get the same result when merging and clipping DEM geotiff files using different steps?
I merged and clipped 12 GeoTif Files with GMTED2010 Data (15 Arcsec) obtained from Earthexplorer to get a large map covering Europa and the Near and Middle East.
First I tried
Variant A)
Raster – ...
0
votes
0answers
110 views
Why does merge/mosaic four DEMs into one give ERROR 01042?
I'm unable to merge 4 dems into one using ArcGIS Home 10.2. Raster Calculator, adding them, gives me the error:
RuntimeError: ERROR 010422: Error in processing the environment mask.
I created a ...
0
votes
0answers
93 views
How do I set the xydomain extent and merge point feature classes in a geodatabase
I am trying to select point feature classes in a feature dataset and merge them while setting the XYDomain using Python. If I do the merge manually and change the environment settings to use a ...
0
votes
0answers
76 views
Getting a final count of integrated points from map [Add XY, Merge, Integrate]
I'm trying to get a final count of points in my data, using ArcGIS for Desktop, 10.1 with an advanced license.
The data I'm working with is about 2,000 addresses from 10 sets of data taken by ...
0
votes
0answers
129 views
How to merge raster quadrangle tiles in qgis?
I've downloaded some dem tiles from here http://www.granit.unh.edu/data/search?dset=dem/dem174, which I'd like to merge into a single smooth digital elevation model usinq QGIS.
So far I've tried ...
0
votes
0answers
92 views
QGIS merge rasters error
I've been trying to merge some raster tiles at work and I've been getting an error message saying I don't have the correct permissions. This works fine on my home pc.
Any obvious reasons for this? ...
0
votes
0answers
69 views
Unwanted lines when cutting & merging polygons
I am using QGIS version 1.8.0. Sometimes when I cut or merge polygons I get unwanted lines left in them. On zooming in to them they do not appear to be slivers. Is there a way of getting rid of these ...
0
votes
0answers
162 views
Merging point shape file problems?
I've got a whole bunch of shape files that have soil testing data in them that I would like to merge together so I can do some analysis but when I use the Ftools merge shape files command I get an ...
