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Questions tagged [combine]

For questions concerning methods and best practices for combining data of different sources, resolutions, or formats to produce new information.

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How to combine segment of a polygon with other segment of a different polygon

There are two polygons (red and green polygons). There is a small geometry discrepancy between the green and red polygons in the "overlapping" section. In this "overlapping section"...
Boer's user avatar
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0 answers
11 views

Combine tool returns a large attribute table

The Crux of the problem is my attribute table being too large. I need a way to combine rows of a raster to preserve some values and erase/change others. What started this problem, however, was likely ...
Zafer's user avatar
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38 views

Snapping vertices of the same line

I am trying to automate a snapping of vertices that exist in the same polyline layer. I first implemented the Multipart to Singlepart tool which split up the up the lines (but lines which were once ...
Ephraim Fruchter's user avatar
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0 answers
30 views

Merge multiple tracklogs or route points to one polyline

I'm having a similar case like the one posted Tracklogs to single line OR several lines to one line?. However what differs in my question here is that I want to display the merged or common shared ...
Sandeep J Patel's user avatar
1 vote
1 answer
65 views

How to merge sample points that are within a certain distance of each other and calculate mean attributes values for merged points in QGIS?

I have a data set like the following in .csv: sample latitude longitude variable1 variable2 variable3 A 37.18 -115.85 1 0 0 B 37.18 -115.85 1 0 0 C 37.18 -115.85 1 0 0 D 39.44 -117.66 0 1 0 E 39....
goshawk's user avatar
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0 answers
78 views

Python: combine datafiles

How can I combine two files to one file with python? I want to combine two files with different area and create them in one file. This file was modis(evi) convert hdf(sinusoidal projection) to netcdf(...
yujin Kim's user avatar
1 vote
0 answers
24 views

LidarJoin tool only processes 1 file, there is no join

New user here. I am trying to combine two .Las files into 1. I add the 2 las files into input box but it only outputs 1 of these files.there is no join. What am I doing wrong?
Gene Del Greco's user avatar
1 vote
0 answers
59 views

Combine a point dataset with multi-polygon dataset

Using QGIS, I need to combine a point dataset with an associated multi-polygon dataset, and clip away any of the polygons which do not have an associated point, please see image attached. The point ...
Techtix's user avatar
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1 answer
727 views

Combining two raster layers in ArcGIS Pro

I am trying to create a raster map with cells with the value 0 (outside study area), and the other cells with value 1 (the study area) I have two input layers for this (the image below) How can I make ...
Menno van der Spank's user avatar
0 votes
1 answer
371 views

Aggregating points within certain distance and keeping all points info using QGIS

I have a map with many duplicate points and I want to combine those points together into one, based on the name and geographical location (10 meters), is there a way to do this with QGIS, given that I ...
Abdullah Abdullrhman's user avatar
2 votes
1 answer
120 views

How to combine two vector layers into one combined layer?

I made two layers for heat stress (PET) and flooding risk. I normalized both maps into a 0-100 scale. The number 0 means a low heat stress/flooding risk and 100 is a high heat stress/flooding risk. To ...
Marlot Rijkers's user avatar
1 vote
1 answer
49 views

Using combine function in QGIS modeler

I am trying to use the QGIS modeler with the 'combine' function, but when I run the model, it only gives me one choice of shapefile to choose instead of letting me choose more than one raster to ...
Guillermo's user avatar
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0 answers
794 views

Combine two raster datasets from different areas - xarray

I simply wish to combine two raster datasets from different spatial extents and with different coordinate reference systems using python. Eventually, I wish to combine enumerable datasets, but ...
Sean Carter's user avatar
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0 answers
70 views

QGIS intersect or summary function not working precise enough?

For my thesis I am trying to convert some data using QGIS. I have: A vector layer with all the parcels of a municipality as polygons and a layer with all the buildings in said municipality as 2D ...
Flo's user avatar
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1 answer
79 views

Combining Band Data

I recently downloaded Landsat 8 and 5 imagery from Earth Explorer, but my problem is that all of my data bands are separate and not composite. Does anyone have any advice for getting them to combine ...
DudeUpHere's user avatar
-1 votes
1 answer
375 views

Manual classification combining bands and defining values in GEE

I would like to perform some manual classification on a single image of S1-data which is fairly simple: either a pixel is classified as 'Water', or it is classified as 'Land'. I did these ...
xxmoze's user avatar
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3 votes
1 answer
1k views

Combine nearby points into single point with average location in ArcGIS Pro

I've added GPS waypoints to my ArcGIS Pro map using the GPX to Feature conversion. However, some points are clearly "duplicates" of the same location because they are so close together. (...
theforestecologist's user avatar
0 votes
2 answers
328 views

Combining FEMA Flood Zones to CSV coordinates in QGIS

I'm new to QGIS but have to do some combining of data for my thesis. I have successfully imported two datasets. One is the ArcGIS server for Flood Zones in the USA: (NFHL: https://hazards.fema.gov/gis/...
Sam Rutten's user avatar
5 votes
2 answers
2k views

Combining point and polygons layers using QGIS

I'm currently trying to compare species sample points vs their actual geographic range. I have: a points layer with species names and each species has multiple corresponding points/records a polygon ...
Fben980's user avatar
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0 votes
1 answer
726 views

How to combine two objects in an ee.List() Earth Engine

I have this type of list in Google Earth Engine: var list = ee.List([[{'class': 1, 'sum': 27188.96}, {'code': 'Cloud'}], [{'class': 2, 'sum': 1190.15}, {'code': 'Soil'}]]) and ...
Luis Lizcano's user avatar
0 votes
1 answer
1k views

Importing Excel data to polygon Layer using ArcGIS Pro

I am using ArcGIS Pro. I have a polygon layer (65 features) saved. My colleague has made an Excel sheet with a number of different columns with different attributes on each feature. Is there any way ...
Robbie-G95's user avatar
0 votes
0 answers
296 views

Combine Polygon and Point Layer

Is it possible to combine a point and a polygon layer in one layer from a shapefile in QGIS?
Christoph's user avatar
1 vote
1 answer
169 views

Categorising raster data based on shapefile boundaries

I've tried searching for an answer but honestly I'm not even sure how to word my search. I'm using Arc GIS Pro. I have two layers that I want to analyse. The first layer is a shapefile and it covers ...
GISNoob's user avatar
  • 13
1 vote
2 answers
198 views

Raster math between image collection and image in GEE - use .map function?

I am currently working with a raster file which shows peatlands in the Congo Basin and the ESA/CCI/FireCCI/5_1 image collection (images for each month between 2001-2019). My end goal is to create ...
Shona's user avatar
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1 vote
1 answer
97 views

Combining parcels that are adjacent and add up to more than 10 acres

I am using ArcMap 10.7. My task is to find a site to be developed for parking. Sites are supposed to be greater than 10 acres. But we can also look at adjacent sites that add up to 10 acres. I read ...
missyivi's user avatar
2 votes
1 answer
5k views

Why use st_union after st_combine with sf?

The documentation of the st_union function of sf is not clear (for me!) on one point: what are the action and result of the function when applied to an sfc with a single feature, with the parameter ...
Jean-Luc Dupouey's user avatar
1 vote
0 answers
688 views

Combining two areas on a shapefile (two polygons) into one

I am trying to combine two polygons or areas on a map into one. I have added a field called region to try and dissolve the borders by region. This did not work. I am now trying to combine them ...
user164867's user avatar
-2 votes
1 answer
393 views

Mosaic 70 rasters to a new raster [closed]

I have 80 rasters that I want to combine with Mosaic to new raster. Is the order of adding inputs important ? Is there any quicker way to add all those rasters ?
Feri's user avatar
  • 13
0 votes
0 answers
134 views

How can I combine multiple raster datasets with multiple unique values in ArcMap 10.6?

I have to combine plenty of raster datasets. The problem is there are to many unique values. I guess that’s because there are layers where areas have geometry and there are not geometry on the other ...
Nirevezs's user avatar
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0 answers
54 views

Combine 8 different shapefiles into 1 with combined attribute fields

I am working on a project where I want to add the attribute fields of 7 different shapefiles into 1 base shapefile. Specifically, I have a parcel map of a city, and I want to append attribute fields ...
Ian's user avatar
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0 votes
1 answer
220 views

What is combine function in QGIS?

There is combine function is ArcGIS which combine multiple raster value attributes in one raster layer. I would like to know what's the same process in QGIS?
Nirevezs's user avatar
0 votes
2 answers
566 views

Combining two scenes with different extents without overlapping in QGIS

My AOI is split between two Sentinel-2 scenes. These rasters do not overlap. So function 'merge' in the Raster menu of QGIS cannot help - it says 'Layers do not have common extent'. How to combine it ...
Maksym Matsala's user avatar
0 votes
1 answer
74 views

Carrying information from one shapefile to another based on location using ArcMap

I am a R user but I couldn't do this on R and decided it might be easier on ArcMap but I don't know how to use it that well. I have two shapefiles for same county, one of them has 360 features but ...
iHermes's user avatar
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5 votes
0 answers
343 views

Finding difference between two vector layers using QGIS [duplicate]

I have two vector layer land cover for 2016 and 2018. I want to get result layer that will show changes in land cover e.g. the forest has changed into a meadow. What option in QGIS can I use to do ...
Karolina's user avatar
3 votes
1 answer
1k views

Why does fasterize gives different output for multipolygons with and without internally resolved boundaries?

I was thrilled to be clued into the package fasterize, which speeds up the rasterization process in R tremendously. However, I cannot figure out why the fasterize() function outputs two different ...
ltlf653's user avatar
  • 33
2 votes
1 answer
2k views

Combining overlapping rasters in ArcGIS

I have two DSM rasters, one is 10km radius photogrammetric data, the other is 2km radius LiDAR data, both centred around the same point. I need to combine these together, essentially inserting the ...
user86032's user avatar
1 vote
0 answers
108 views

I want to combine or merge rasters

I am combining many rasters using a "barcode" that describes attributes for each cell. Combine works on integer values: I combine multiple layers using "combine" tool, then create the bar code by ...
TobyG's user avatar
  • 21
0 votes
1 answer
1k views

Join CSV data to a raster file in QGIS

I am trying to join three data files to a raster grid: I have environmental data in the centre of each grid cell (delimited text layer), Sightings (delimited text layer), effort points (delimited ...
Lauren Emily's user avatar
2 votes
1 answer
74 views

Merge/Dissolve Polygon overlapping within

I have a polygon that has been broken down to an intersecting analysis point. Each segment has its own acreage within an acre field on the attribute table. I want the intersecting lines to be removed ...
Christian's user avatar
3 votes
0 answers
169 views

Combine two raster maps with transparency

I have two maps in geotiff format for exactly the same area with exactly the same geoinformation. The first one is a real land map, the second one is a satellite picture with clouds (rgba where alpha ...
Frank's user avatar
  • 31
0 votes
0 answers
296 views

.nc file flipped and rotated in qgis, no CRS, need to be able to project properly to make a masl

I have two separate files, one is my Land Surface Temperature and the other is the Grid with the lat/lon both are .nc I wanted to add my grid, which comes in as an attribute table, to my Land Surface ...
vacul22a's user avatar
1 vote
1 answer
335 views

Seamlessly combine map layers (fill the gaps of one layer using the second one)

I am creating air quality maps using two approaches. One of them gives slightly better results when validated against measurements but there are significant spatial gaps present in the output. The ...
Janina's user avatar
  • 708
0 votes
2 answers
75 views

Return values from combining different fields

I'd like to classify parcels according to combinations of front setbacks and side setbacks. I have a "Fr_sb" field with values 0 (no front setback) and 1 (with front setback), and a "Si_sb" field with ...
mirandajules's user avatar
2 votes
0 answers
537 views

Creating raster layers, weighting them, and combining them in QGIS [closed]

I'm looking to create raster layers from vector layers, rescale them, weight them then finally combine them for a final result. I'm really not sure about the process to do this. On Arcmap it's ...
ShockDoctor's user avatar
0 votes
1 answer
2k views

Combining polygon and raster using ArcGIS Desktop?

How do I combine the raster data and county outline polygon so that only the elevation data within the county boundaries is displayed?
B.ww's user avatar
  • 1
0 votes
1 answer
216 views

Combining features with multiple similar field values to one and adding unique values as new fields using ArcGIS Pro?

I am using ArcGIS Pro. I have a table with several objects that are identical with the exception of one field that has several unique values. How can I merge these multiple features into one and ...
Paul Sweeney's user avatar
1 vote
0 answers
131 views

Creating population weighted spatial join of two layers with intersecting polygons using ArcGIS Desktop?

I have data where I sampled my outcome using a grid of 1-mile radii but my explanatory variables are at the census dissemination area level. I would like to average my census dissemination area-...
Kiffer Card's user avatar
2 votes
2 answers
6k views

Spatial join of multiple different point layers keeping all attributes in ArcGIS

I have 28 fairly large point data sets (1/6 degree global grid), all of different extents but with the same point location (previously extracted as centroids from raster pixel). Each point layer has ...
Kristina's user avatar
  • 1,073
4 votes
3 answers
6k views

Counting raster values in each polygon using ArcGIS Desktop?

I have a Watershed with ~100 smaller watersheds as a shapefile. I want to count the number of different land use values (they are in a 30x30m raster) in each of the small watersheds. I tried ...
Squeezie's user avatar
  • 250
3 votes
1 answer
318 views

Combining (merging) neighbour points to one centred point in PostGIS (reducing density)?

I'm new to spatial algorithms and PostGIS functionality. Currently I have a Pg 10 + Postgis 2.4 database with table of more than 400 000 records (points with additional properties), with Node.JS tile ...
Vladimir Victorovich's user avatar