Geographic Information Systems

Questions tagged [merge]

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To combine two or more parts into a larger whole.

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Merging one polygon that is entirely contained in another polygon in R

I am working with subcounty division polygons obtained with the tigris package in R. Some of the county subdivisions polygons are entirely contained within another polygon. For an example of this, we ...
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2answers
65 views

Merge thousands of geodatabase into one feature class

I have over 1000 file geodatabases (fgdb), each fgdb contains ONE feature class (polygons) and covers different areas of the country The aim is to merge/append all feature class from fgdb into a ...
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2answers
54 views

Merging small polygons into larger adjacent polygons using QGIS

I wish to select just the small green polygons (see image) and merge these with the pink polygon. However, I wish to leave the large green polygons that are over 1km2. However, all the green is one ...
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1answer
26 views

Merging two landsat images

I have several Landsat 5 Images to merge together. As far as I saw from tutorials and previous questions there are two main methods (and none seem to be working for me): 1 - raster » miscelaneous » ...
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1answer
50 views

sf geometry column naming differences R

I've got several shapefiles stored as geopackages and I want to merge all of them by using rbind. But unfortunately the geometry columns are namend differently as "geometry or "geom" ...
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4answers
93 views

Merge several polygons/features into one continuous area not working

I am using QGIS version 3.10. I have a farm boundaries layer (https://drive.google.com/drive/folders/1xYZmSboM75GACCWQyx-06wZ3EdHBcMrM?usp=sharing), and want to merge certain adjacent polygons into ...
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0answers
29 views

Can't calculate raster using QGIS

So I'm new to QGIS (2 days) but have spent HOURS on it everyday trying to learn it to process raw SRTM data make 3D relief maps on another software, so I can work my way around it but can't really do ...
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1answer
19 views

Getting a list for Gdal “Merge” in QGIS Graphical Modeller

I am looking for a way to create an array from the attributes of a multipolygon layer for the algorithm "Gdal Merge". In my layer I have stored file paths to .xyz-data that I want to read so ...
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1answer
42 views

QGIS: Merge two vector layers and remove overlaps in one step (PyQGIS)

I have two overlapping polygon vector layers. I want to combine these two layers into one vector layer, but I don't want to keep overlaying parts - the blue layer is of higher importance (weight), so ...
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Postgresql - Snap intersecting and broken MultiLineString

Im trying to use Postgresql to fix a few thousand hiking trails that i have in a map source. Now i have all of the trail parts as MultiLineString but my issue is that each of the trails are broken ...
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How to dissolve overlapping distance isochrones

For my master's thesis I need to create distance isochrones (10/20/30/../100km) around certain coordinates. In my case they overlap and I want the overlapping parts to dissolve, but at the same time ...
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Merging two GeoJSON files for Leaflet Map in R

Does anyone know how to convert 2 GeoJSON files into 1 in R? I'm trying to build a Leaflet map for the two files together. library(geojsonio) library(leaflet) dataset1 <-geojson_read("https://...
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1answer
15 views

Road Connectivity Analysis by field

I'm currently trying to do a connectivity analysis of roads of a specific type. (how far can you get before encountering a dirt road?) Ideally, I want the map to look something like this: It is ...
4
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1answer
43 views

Merge and Delete with priority overlapping polygons QGIS

I have two shapefiles with polygons: one is regions for a country and the other is the protected areas inside that country. I have merged these two polygons with Union, but the regions and protected ...
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1answer
24 views

Merging Lines - up to 200ft distance

I have inherited data that is in need of the lines to be in the same place. Unfortunately this is not how the data was made. I have been moving these by hand. Is there a tool that will arbitrarily ...
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0answers
19 views

Joining lines with SLD style in GeoServer [duplicate]

I want to create a sld style in road lines in qgis. the style has a fill and a border symbology. Everything is ok in qgis but i have an issue with the style in geoserver. The lines do not merge at ...
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3answers
128 views

Joining/merging rows by attribute

I have a beautiful grid/polygon, each square having its own "ID", and several observations for each square. But, I have three categories of observation, each with its own row, matching the ...
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1answer
46 views

Merging two data sets (multiple satellite images) based on their names using ArcPy

I have two folders containing 1800 files each. I need to merge or combine them based on their names, e.g. file MOD10A2.A2017177.h24v05.006.2017187224801.tif in folder A should combine/merge with the ...
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0answers
55 views

Artefacts when merging different resolution DEM

I am trying to merge a 10m DEM with a 30m DEM (10m DEM is a sub area of the 30m DEM). Both DEMs have the same projection and nodata value. I create a .vrt file: gdalbuildvrt test.vrt *.tif -resolution ...
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0answers
51 views

What does this raster merging error code mean?

I was wondering if anyone could help me understand how to solve what this error message means and what I need to change to merge my DTM rasters with an asc extension. I am able to see the individual ...
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0answers
27 views

Merging overlapping thematic rasters using ArcMap

I want to merge two overlapping rasters. Raster A has 8 classes and raster B has only 1 class. I would like to produce Raster C with 9 classes, where Raster B would overwrite corresponding pixels in ...
2
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1answer
39 views

Merging multiple shapefiles and finding which shapefile gives the minimum value for each attribute in QGIS?

I have several different shapefiles that I want to combine into one based on the minimum value of each attribute. I found this solution. However, I also want to know which shapefile each minimum value ...
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36 views

I have a problem merging rasters

I have about 50 JPEG rasters. I need to merge them into one 8bit TIFF and cut by a shape file (border) without NoData values. When I Clip the merged raster in QGIS it makes holes in it like in cheese. ...
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2answers
30 views

Merging features using Collector for ArcGIS (Field Maps)

In 'Collector for ArcGis', is it possible to merge two polygon features (from two different layers) into one feature? It would be required to decide from which layer the attributes are used.
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1answer
30 views

Replacing Null attribute with the value of the nearest feature

I have several polygons with "Null" values that I would like to give them the "Name' of their nearest polygonal feature. As you see in the photo, the light green polygon is actually a ...
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1answer
26 views

Merging attributes into shapefile (US County-level data) using R

I'd like to make a plot of the US, with each county colored according to a scalar value (the average summer temperature). I'm using R. I have a shapefile with all the counties: > shape = st_read(...
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0answers
18 views

Combining Geometric Networks?

I created a geometric network for every town in the state of Rhode Island with manholes & pipes. I want to be able to trace downstream/upstream from anywhere in the system for the entire state. Is ...
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0answers
20 views

Missing features after merge/append

​I was trying to merge stream lines from many HUC polygons into one. Currently these stream lines are stored in one geodatabase as separate feature classes with each feature class corresponding to one ...
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2answers
163 views

Merging multiple lines by value field

How can I join these lines depending on the Trigger field. The condition is as follows, the fields must be ordered in ascending order after the fid field from 1 to 68. Thus, I want to join all my ...
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1answer
42 views

Merging attributes by location in PostGIS

I am a newbie on PostGIS and I want to transfer an attribute or even a symbology from a layer to another. For example, I have a file with points that each country has a point at the center, I want to ...
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1answer
32 views

Merge polyline feature at vertex intersection based on segment count [duplicate]

I have a Polyline layer in QGIS which is split into multiple segments using the explode lines tool (the black lines in the image). There are nodes created from the 'extract vertices' tool (the red ...
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1answer
42 views

Removing gap between polygons in ArcMap

I have a large shapefile with polygons. Some of them have roads between them, but apparently the roads have been deleted. Therefore, there is only space between the polygons. I want them removed in ...
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1answer
33 views

Merging two shapefiles only for those polygons that have same boundaries or within tolerance distance using ArcMap

I have two shapefiles for district boundaries of India in 2001 and 2020. Because boundary of districts changed over time since districts merge and split, I want to export only those districts (they ...
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0answers
23 views

Removing visible lines between merged Sentinel-2 L2A tiles

My project area is covered by 4 different S2A MSIL2A tile but when I merge those different tiles on QGIS I can see visible lines between them as shown below. TILE 1: ...
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0answers
19 views

Updating and merging geometries using a 3rd table as the connector

I'm looking for some help with the following. I have 3 tables in my Oracle Database. Table A: IDnumber Geometry 001 Geom1 002 Geom2 003 Geom3 Table B: IDnumber Fieldnumber (...
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30 views

Updating geometries using another table whose records need to merge in SQLDeveloper

I'm looking for some help with the following. I have 3 tables in my Oracle Database. Table A: IDnumber Geometry 001 Geom1 002 Geom2 003 Geom3 Table B: IDnumber Fieldnumber (...
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1answer
44 views

Changing default parameters of “Merge Selected Entities” in QGIS 2.18

I am using QGIS 2.18, and I am looking for a way to change default values of the Merge Selected Entities algorithm. To make it short, I have in my shape file buildings that are divided in several ...
0
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1answer
53 views

Merging shapefile with dataframe and plotting using R

I am using R. I have a shapefile that gives me the provincial boundaries for a state and I want to use another dataset to combine the aggregate total enrolment in schools by 'district' to the ...
1
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1answer
21 views

Dissolve FeatureCollection using attribute

I have a feature collection with a number of properties, all numbers. I want to aggregate all features in the collection that have a property in common. For instance, I want to merge features that ...
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0answers
25 views

Merging multiple point shapefiles that have same coordinates but different years

I am using ArcGIS Pro. I have 35 shapefiles of point data, with each layer representing a different year of data collection. Each layer has points with the same coordinates. I want to bring these ...
4
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1answer
42 views

Iterative merging of .shp per folder through multiple folders using ArcGIS Pro ModelBuilder

In ModelBuilder for ArcGIS Pro, I'm trying to create an iterative model for merging pointfiles according to their names. This is a pre-processing step to handle echo-soundings, spread over one or ...
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0answers
34 views

Error while merging two line segments

When I'm tryong to merge two line segments in QGIS, I get this error: Invalid result: Could not store value 'Skipped' in field of type Integer64. What does this mean? One example is showned in the ...
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0answers
23 views

Combine polygons in a layer

I am trying to build a model in arcmap that (1) converts a raster to polygon (2) dissolves the polygons by landcover class (3) adds a field that calculates area of the landcover polygons. I want to ...
2
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1answer
68 views

Merging two multipolygon tables into one and afterwards dissolving boundaries using PostGIS

I am trying to merge two multipolygon tables into one and at the same time - in the same query - dissolve the boundaries between the polygon districts using postgis. The two tables are the red ...
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0answers
26 views

Fixing white portion of a merged TIFF

I am trying to add a merge layer to my project. I noticed that my merged layer has a region that is way too white, I am trying to fix that white space by adjusting the interval value from 0-255 to 0-...
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0answers
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Edit GISJOIN attribute ID from census data

I have two dataframes d1 and d2. My data frames are census data from 2010. I want to merge them using a common attribute (merge (d1, d2, by.x="GEOID", by.y= "GISJOIN"). d1 has the ...
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28 views

Special characters changing to “?” using ArcMap

I am using shapefiles in Spanish that I'm using to build a database and the special characters are displayed as normal, but as soon as I ran an operation on the layer these characters change to ?. I ...
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0answers
43 views

Merging multiple feature classes into one feature class

I have several feature classes in different geodatabases and I am trying to merge into one feature class, same geometry one attribute table in one geodatabase (attribute fields are the same). It keeps ...
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0answers
40 views

Merging/unifying polygons from same layer when boundaries are touching using ArcGIS Desktop

I have a big layer full of polygons. The ones that are separated, are individualized. However, I want to join the ones that have their boundaries touching each other (look at the image). For example, ...
3
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1answer
91 views

Combining two shapefiles using common attribute

I have two shapefiles "sf1" and "sf2" for same area. "sf1" is population data for year 2015 and has 6 variables. "sf2" is population data for year 2010 and ...

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