Questions tagged [subset]

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2 answers
48 views

Subset polygons in R

I am trying to separate a specific area on my window of analysis. I have a georeferenced floor plan with rooms as polygons. I want to select and plot only some the rooms I tried this: rooms <- ...
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0 votes
0 answers
4 views

SQL Summing a column value based conditional on another table's value [migrated]

I'm working on a SQL query that returns a SUM of a value in a column/table based off a related value in another table's column being met. I'm getting an error: The multi-part identifier "Charges....
1 vote
3 answers
141 views

How to subset a raster stack by year with a loop in R?

So I have a folder with loads of .tif files showing NDVI. What I want to do is read them into a rasterStack, then subset that stack by year. I've been able to do this manually, but I'd really like to ...
0 votes
1 answer
37 views

Random selection of XY% of points within fishnet cells in ArcGIS Pro

I am using ArcGIS Pro and have a feature class of approx. 30.000 points and a polygon grid. Within each grid cell I want to select XY% (50, 70 or any other percentage) of the points (see picture). I ...
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1 vote
0 answers
59 views

How can I match the colors between the subset and the original image?

I have test subset using an AOI, and I have unchecked the "Ignore zeros in stats." option in the subset dialogue box. The difference in colors may have been cause by the histogram re-...
3 votes
2 answers
812 views

How to subset a SpatRaster by value in R

How do I subset a SpatRaster from the R terra package by value? This is the raster: > rh10 class : SpatRaster dimensions : 2732, 4379, 1 (nrow, ncol, nlyr) resolution : 1000, 1000 (x, y) ...
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-1 votes
1 answer
52 views

Subsetting a specific number of features in a large dataset so that they are all together in ArcMap

I have a very large feature layer consisting of polygons of different sizes. I need to select or subset a certain amount of features (say I need 4 polygons of size x, 6 polygons of size y, and 10 ...
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0 votes
0 answers
12 views

Resize two different resolution classified image in ENVI

I have two classified image. one image classified based on 30 meter resolution image and another one based on 1 meter resolution image. My image base is that 1 meter resolution but the first ...
1 vote
0 answers
22 views

Supervised classification in parts

I have an image from 1990 (res 30m, also clouds) for an area equal 2100km2 and when I performed the supervised classification, the software (ERDAS) confuses the classes that look similar. Is it ...
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0 votes
1 answer
55 views

Randomly subsetting x% of polygons where attribute value=x for a large feature class using ArcPy

Referring to this topic: Randomly subsetting % of polygons by class/attributes using ArcPy...I am trying to randomly subset a % of polygons based on an attribute that they all share. For example, I ...
1 vote
1 answer
137 views

Iterate through ee.List of strings containing dates to subset to new ImageCollection

I've got a Sentinel-2 ImageCollection that I want to subset by date. The example below contains images from two dates (2019-02-17 & 2019-02-20), and I want to separate them. The i_date and f_date ...
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1 vote
1 answer
134 views

Creating Catalog Subset using lidR

I have a catalog of just over 3000 LAZ files that I want to split into regions using clip_rectangle(). The total catalog size is 60GB. My PC has 64GB of RAM but I get an error that lidR is unable to ...
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2 votes
0 answers
250 views

Clipping multiple raster with multiple shapefiles in Python

I am trying to adopt existing code for clipping multiple rasters with multiple polygons based on this link: Subsetting multiple rasters with multiple shapefiles using Python I added the following ...
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1 vote
1 answer
134 views

Apply Jenks classification on a subset of features - PyQGIS3

I have a layer of watersheds, and a layer of diagnostic units, that are contained in each watersheds. I have indicator values for each diagnostic unit. Indicator values have been normalised according ...
6 votes
4 answers
827 views

Taking only the largest polygon from MultiPolygon layer in QGIS

I have MultiPolygon geometries in my file, and I want to take only the largest polygon within the MultiPolygon geometry to further work with it. I tried using the "Multipart to singleparts" ...
4 votes
1 answer
359 views

Subsetting multiple rasters with multiple shapefiles using Python

I want to subset multiple raster files with multiple shapefiles and the following code is working (it is not the whole code, only the part for the subsetting). I am using Python 3.6.8 i_shp = 0 # ...
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5 votes
2 answers
195 views

Subselecting features in QGIS

Is there a way to subselect features in QGIS as can be done in ArcMap? For example, I have 5 features selected, and I want to look at each one of them individually (e.g.: zoom to), without unselecting ...
2 votes
0 answers
39 views

QGIS Get maximum sum of a feature subset in Atlas-View

I have a data-layer called data wich looks like this: I also have an atlas-layout with pagenames defined by the column Jahr from the another Layer, representing the unique values from the Data-Layer. ...
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1 vote
1 answer
836 views

Rasterio: select subset of georeferenced image by lop left coordinates and height, width

I want to subset a 10m sentinel dataset using rasterio window modul. I have tried using the window = from_bounds(...) part in .read() however it requires for me to put in the left top right bottom ...
3 votes
1 answer
104 views

Subtracting line features in QGIS

Doing network analysis in QGIS. This is where I came from: Start situation: + 600 points with fid and 1 relevant attribute. Also road network data. First step: ran "network tools - service area (...
0 votes
0 answers
395 views

Shifting in pixel after subsetting with gdalwarp

I am trying to subset multiple image to smaller Area of interest I have tried with gdal_translate & gdalwarp in commandline but it causes slight shift in pixel in the output raster after cropping/...
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2 votes
1 answer
373 views

R {sp} spatial subset: keep so many polygons as number of overlapping points

I have a set of overlapping spatial points and spatial polygons. I need to subset the polygons by overlapping points, but, if my polygon contains 2 points, I need to keep polygon twice, etc. To keep ...
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2 votes
0 answers
79 views

Where_Clause expression working for one FeatureClassToFeatureClass_conversion export but not another

I am attempting to export a feature class to both a shapefile and feature class with a where_clause restriction on particular values within particular fields. I have written a function to take dataset ...
1 vote
1 answer
245 views

Count subset of points in polygons

Being an SQL-noob, I found a working solution to generate a virtual layer with counts of points in the polygons of another layer, inspired by this https://gis.stackexchange.com/a/54680 SELECT ...
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1 vote
0 answers
75 views

Getting subset with same cordinates for different rasters using gdal.translate?

I am a new into Python. I have processed 1000 NDVI rasters covering larger area. I need to burn those NDVI raster with Water mask. The water mask came for whole world I need to subset AOI and also ...
  • 57
4 votes
1 answer
2k views

Spatial subsetting SpatialPolygonsDataFrames completely within selecting area using R

I am trying to spatially subset in R: the forest stand data (many small polygons) by the watershed data (one polygon) My datasets are both in SpatialPolygonDataFrame format. I don't want to ...
  • 3,276
1 vote
0 answers
84 views

Speeding up spatial subsetting in R?

I need to subset a global fishing dataset to just have the fishing in the Pacific. Right now I have a shapefile of the Pacific and I am using the sp method of subsetting (see below) oceans <- ...
0 votes
1 answer
530 views

Subset raster stack in R by a vector of number sequences?

I have a large raster stack that I need to subset by somewhat irregular time spans. I'd like to do something like this: rstack[[c(1:3, 4:8, 9:15)]] But there are 30 sequences like the ones above ...
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2 votes
1 answer
2k views

subset FeatureCollection by position - Google Earth Engine

I have a FeatureCollection such as: // Make a list of Features. var features = [ ee.Feature(ee.Geometry.Rectangle(30.01, 59.80, 30.59, 60.15), {name: 'Voronoi'}), ee.Feature(ee.Geometry.Point(-73....
2 votes
1 answer
2k views

Subset raster stack with logical indeces R

Is it possible to subset a raster stack by indexing on a logical vector? r1 <- raster(nrow = 100, ncol = 100) r1[] <- round(runif(ncell(r1), 1, 4), 0) r2 <- raster(nrow = 100, ncol = 100) r2[...
1 vote
1 answer
1k views

Making subset of Sentinel-2 with rasterio?

I am looking for a solution to my problem with rasterio. I want to download just a specific part of the image from AWS based on lat lon coordinates. Rasterio offers a great tool (window) although it ...
1 vote
1 answer
81 views

Add a scale or category to a rule which is only applied to points within original subset in QGIS

I have subset a shapefile of points to only include those having a value of (for example) 33 in the variable "Bout" using a rule based assignation: Now I would like to apply a sub-category to that ...
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1 vote
1 answer
387 views

Randomly selecting single point from within multiple fishnet grid-squares?

Using ArcGIS, I have a large data set of occurrence data many of which are in similar places. I have created a fishnet around the total area and want to select a single random point from within each ...
2 votes
0 answers
640 views

more than one reactive events to subset markers in Leaflet in R

I am trying to create a shiny ap in R that displays markers on a map. I have a couple of categories that I would like to subset. Currently, I can subset but the map is only reactive on a single input (...
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3 votes
1 answer
959 views

Subset SpatialPolygon using Raster in R

I have a polygon and raster with the same extent: library(rgdal) library(raster) library(rgeos) library(sp) # make the polygons df <- structure(list(LAT = c(35.61226, 35.34986, 35.17794, 34....
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0 votes
1 answer
976 views

Spatial subset using a rectangular bounding box - geometry not in Mercator?

I want to restrict my feature collection (in red, below) to the conterminous U.S. I found this solution to create a bounding box: var continentalUS = ee.Geometry.Rectangle(-127.18, 19.39, -62.75, 45);...
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2 votes
1 answer
216 views

Cannot write a subset of features back to the source Geopackage or File Geodatabase

At QGIS 2.18.16, I have a Geopackage point layer with a selection subset. I need to write the selected records to the same Geopackage as a new layer, with a new name. When I attempt to Save As... ...
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1 vote
2 answers
1k views

Not giving output for gdal_translate

I am using following code to take subset of all files in a folder. The code is not giving any error but it is not creating output files. How to solve it? import numpy as np import re import gdal ...
3 votes
0 answers
973 views

Subset polygon data of SpatialPolygonsDataFrame by Distance to a Set of Coordinates in R? [duplicate]

I am learning and I made a very similar question when I hadn't learnt what a Spatial Polygons Data Frame was about 10 days ago: https://stackoverflow.com/questions/49193867/select-raster-in-ggplot-...
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4 votes
1 answer
3k views

How to subset point data by outside of polygon data in R

How can I subset point data from outside of polygon data in R? Currently, I can subset point data inside polygon data, now I want to get point data outside polygon data. library(sf) nc <- st_read(...
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1 vote
0 answers
336 views

GeoServer WCS 2.0.1 subset request data with different file dimensions

I'm trying get two sets of data using WCS 2.0.1 request from my GeoServer and do raster calculation using GDAL's gdal_calc.py. Both datasets in GeoServer are converted to the same coordinates and same ...
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