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Questions tagged [extract]

To obtain a subset of a spatial object, by means of some logic or query

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14 views

extract values from raster function taking too long

My task is to extract values from raster A and B from point location file A and B, respectively. Both point location files have 375152482 obs. of 2 variables. The only different is A is in XY ...
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28 views

Extracting Ridges from DEM ALOS

I'm currently working on a forestry project for my thesis. It consists of the optimization of skids tracks planification using ALOS images. To this end I would like to extract obstacles such as steep ...
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1answer
69 views

Extracting qualified image patches in Google Earth Engine?

I want to extract qualified (e.g., cloud-free) image patches (e.g. size of 128x128) in a large image (e.g. 10000x10000) in Google Earth Engine. These image patches can overlap with other qualified ...
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33 views

Extract point data to polygon features [duplicate]

I am trying to import data from a point that lies on a certain polygon feature (or raster). As an output I would like the polygon feature to have the point data as a new field in the attribute table. ...
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27 views

QGIS-Export Raster Values to a .csv file

I use a Raster, based on .png and .pgw file. (plans from a town) The plans include information about where buildings are allowed to be built and maximum building height, ground elevation etc. Now i ...
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36 views

All (GeoTIFF) raster values NA after converting to velox

Cross-posted to the velox GitHub repo: https://github.com/hunzikp/velox/issues/40 I'm able to extract average tree cover values for each of the three small counties in the US State of Delaware, but ...
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1answer
22 views

Intersection of two sets in openstreetmap to find parent of any area

I am trying to determine what the parent administrative area of any given area. The idea is that the closest parent is the administrative area with the highest/deepest admin_level that is shared as a ...
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31 views

Extracting single band from multiple band raster with PyQGIS?

I'm approaching naw in the script and I'm trying to select many multi-band files from a folder and extract a single band from the file, putting everything in an output folder with the single-band ...
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33 views

Split many multi-band files into single-band files using PyQGIS? [closed]

I wanted to know how to take many multi-band (RGB) files in a folder and extract a single band from each one, putting everything in an output folder with the single band transformed files. How should ...
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34 views

Selecting only coinciding points

I have a lot of points in the same layer. Many of these are coinciding. I only want the points that coincide slected or the points that don't coincide (then I can just reverse the selection). This is ...
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17 views

Extract pixel number of Hansen lossyear map

I would like to extract the number of Hansen pixel for each different polygon of a shapefile. So if the polygon contains for example 10 pixel of Hansen I would like a column with this value. This is ...
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2answers
33 views

Extracting Multi Values to Points temporally as well as spatially from NetCDF raster layer using ArcGIS Desktop?

I have created a map in ArcGIS 10.6 which includes point data from ARGOS satellite tagged turtles. Each point has a date/time field in a dd/mm/yyyy hh:mm format. I also have a sea surface temperature (...
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1answer
44 views

Units of specific CRS projection?

I use a shapefile with CRS ("+proj=longlat +datum=WGS84 +no_defs +ellps=WGS84 +towgs84=0,0,0"). I want to calculate a buffer around the points with 'extract' from raster package. How can I know the ...
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2answers
38 views

QGIS Points in a Polygon extract name information from Individual polygon

I am new to QGIS and need to know how to extract names and address' from the points in certain polygons. My main layer has all the points on the maps and then I drew the polygons on the map. I then ...
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32 views

Extracting value of raster based on points layer?

I want to extract values from a raster file containing gridded population in US (spatial resolution of 1X1 km) based on points shapefile, also in US. Both are in the projection. Here is my code: # ...
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1answer
42 views

Centroid value extraction of Landsat image collection in Google Earth Engine

I have an NDVI collection wich I have created from the combination of different collections Landsat5 and 7. How can I exctract the NDVI values of the centroids of each pixel, of each image from my ...
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2answers
36 views

Using Extract Data tool without compressing?

I am looking for a way to either use the Extract Data tool within ArcMap without it compressing the files into a .zip at the end, or a way for the Clip tool to have a way to select multiple feature ...
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67 views

Extract raster cell values by polygon field

I have a raster as a RasterLayer (raster) and a polygon layer (bound) with 38 individual polygons as a SpatialPolygonsDataFrame. I used the polygon to mask from a larger raster. Each polygon contains ...
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18 views

Extract values from multiple rasters based on lookup of raster file name

I have 11 raster files (waveheightfiles), and need to extract one value from a different set of coordinates (station) for each raster. I have a list of 11 coordinates (df2) and have used part of the ...
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20 views

Extraction Burned Area from MCD64A1 for Region

I would like to extract burned area and burn date information from MCD64A1 MODIS Collection 6 global burned area product. The data is in monthly composites with burn dates in julian days. I need it ...
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1answer
75 views

Raster extract function problem [closed]

I used to run the extract function from raster package without any problem. However, recently I receive an error message and it does not work for me. When I run the extract function to extract stacked ...
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0answers
47 views

Extracting data from multiple raster layers in QGIS

I have a raster layer containing climatic monthly data: rainfall maximum and minimum temperatures There is one layer for each variable and month. I want to extract the average and maximum values ...
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1answer
102 views

Extract Raster to Multiple Rasters by List of Values in R?

I'd like to use the Raster package in R to process a single DEM. I'd like to use a pre-determined list of elevation values to extract multiple raster datasets from this DEM. Not all values are of ...
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1answer
71 views

Extract raster data with coordinates

I have downloaded the following data as a GeoTIFF and I'm interested in determining the value from this raster at specific locations. raster = readGDAL("filename.TIFF") summary(raster) Object of ...
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51 views

Raster centroid and relationships with geoTIFF

I have a list (s) containing information on the probable locations of many animals in South America. For example, this is the type of stored information and what it looks like when plotted for the ...
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1answer
93 views

Extracting data from vector tile package (.vtpk) using ArcGIS Pro?

I have been provided with 1m land contours in a vector tile package (.vtpk). It is 14GB. Is it possible to extract the data from the .vtpk into a geodatabase? I have access to ArcGIS Pro 2.2, ...
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54 views

Extracting polygons from mbtiles

Currently, one can extract features within a bounding box from an mbtiles file using tilelive-copy. However there is no way to extract features within a polygon from an mbtiles file. The mbtiles-...
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1answer
214 views

Extracting mean values in Earth Engine

I am trying to extract the dates and mean NDVI values of a processed Google Earth Engine image collection thru Python. All goes well until I try to use getInfo(), where I always encounter this error: ...
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1answer
91 views

mbtiles-extracts does not work with my geojson

I am working with the mbtiles-extracts library: https://github.com/mapbox/mbtiles-extracts. Given an mbtiles file and a geojson, the library extracts mbtiles cutouts of the polygons in the geojson. ...
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1answer
71 views

Speeding up ST_Value in PostgreSQL?

I am working on a large point file and am looking to get the raster value underneath each point. I am using: UPDATE Locations a SET image3b3_sum = ST_Value(rast, 1, geom) FROM image_sum_sum; 10 ...
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1answer
44 views

Extract values from multiple rasters using lat / long and save as one CSV file

I would like to extract values from multiple rasters with a single lat / long or Shapefile. I have tried every tutorial and stackoverflow post and am getting nowhere. Maybe someone could please help. ...
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1answer
42 views

Extract value from vector to another

I have two vector (shapefile) data. One contains soil order for county, and the other one contains boundary for each county. I want to extract the soil order for each county by using county boundary. ...
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1answer
59 views

Extracting Road Terrain Properties using DEM / LIDAR

I want to extract following road terrain data from DEM but I'm not sure if its possible. Can i extract these attributes using LIDAR if not DEM ? These are the data fields I need: Horizontal curve ...
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1answer
65 views

Extracting point data with PyQGIS? [closed]

How to extract x,y,z values from a point/node in PyQGIS? I am working on QGIS 3.
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1answer
56 views

QGIS Mask - Error Code

I am trying to interpolate points and then clip the interpolation with a Raster> Extraction> Clipper. I receive an error code after trying to mask over the region I am interested in. Would you ...
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1answer
32 views

Creating plots and then extracting data from a TIFF file

So I have a giant .tif file with mean tree height data over the Everglades. I have a number of 10x10 field plots in the area. For each plot, I have the center point and want to create a circle plot ...
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18 views

Extracting maximum cell values to Intersecting polylines

I have 2 datasets. The first one is a 32 bit floating point raster, that identifies a flood depth value, in feet. The second one is a roadway feature class, segmented at each road intersection. I have ...
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1answer
73 views

Extract pixel values using pixel condition in R

I am preparing a dataset to run a SVM classification. So far, I have a raster stack which includes a layer ([6]) for training > S1 class : RasterStack dimensions : 3865, 6899, 26664635, 6 ...
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1answer
233 views

Extract raster values to CSV in Python

Attempting to gather MODIS aerosol data for a number of different AERONET stations in the UK to plot against one another. However, due to the number of files (upwards of 2000), QGIS and ArcMap crash. ...
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1answer
94 views

Extracting vertices in line segments using ArcGIS Desktop? [closed]

I have ArcGIS Desktop 10.6 and have many polyline features and want to be able to extract the vertices of each line segment that looks like this: I want to keep the line ID associated and be able to ...
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1answer
55 views

Extract the “mid/center-point” of the touching borders/lines of adjacent polygons

I have a layer with several polygons and want to extract the "mid/center-point" of the touching borders/lines of adjacent polygons. Despite trying several methods, I do not know how to achieve what I ...
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1answer
118 views

Compute forest loss per polygon in Google Earth Engine

I am trying to compute the total forest loss based on the Hansen dataset in Google Earth Engine. I would like to know the total number of pixels lost per polygon of a shapefile imported as a feature ...
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1answer
793 views

How to extract values from .tiff file using R?

Maybe a rather simple question, but I could not find an answer. I am trying to extract long, lat, value from a .tiff file of a map of Africa with long/lat and soil acidity as the values. Here is some ...
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1answer
485 views

Extracting point data from raster files

I have many raster data in tiff format. I need to extract the values for some coordinates and save it as a csv file. I have a code to extract data from some stations across the raster flies, and the ...
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0answers
24 views

Discrete value extract from raster

I am trying to extract values from a landuse raster layer to a point shapefile. However, when I use either Extract Multi Values to Points or the Extract Values to Points tool, it returns pixel values ...
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1answer
291 views

Understanding Extract Multi Values to Points performance in ArcPy?

I am trying to extract points from multiple raster files into a points shapefile. I have about 320,000 unique XY coordinates which need to extracted values from 37 raster files. I tried running the ...
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1answer
177 views

Extracting only some properties of each feature from a feature collection and creating a new a feature collection from them using Google Earth Engine

I have a feature collection but I need to make a new feature collection from it by taking only some columns , I am new to google earth engine and am unable to do so ,the code is NDVI=NDVI.map(...
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244 views

Extract pixel values at given point dataset and if masked find the nearest pixel value

I need to extract the values at each pixel foe a feature collection from an image and if they are masked the value at nearest pixel, my feature collection is named table and the image collection I am ...
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1answer
565 views

Fastest way to extract a raster in R (improve the time of my reproducible code)

I'm wondering if I have maximized the speed at which a mean of an area buffered around a point in a raster can be extracted. Fastest way I have ever found to extract a raster, with the pre-cropping ...
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1answer
148 views

Extracting raster values to polygon: error “arguments imply differing number of rows:1549, 0”

I am trying to extract the mean of a raster data to polygons with the following code: library(rgdal) library(raster) library(maptools) agri_suitability=raster("suit") regions <- readShapeSpatial(...