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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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34 views

Extract Raster Values with points in R

I have a raster file with gridded population raster26 class : RasterLayer dimensions : 132, 140, 18480 (nrow, ncol, ncell) resolution : 699, 931 (x, y) extent : 2248290, 2346150, ...
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2answers
112 views

Extract vertices QGIS 3

I am using Extract vertices in QGIS 3. The table in result shows angles. What do those angles mean?
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1answer
97 views

Extracting X and Y coordinates from .gpx file using QGIS?

I'm using QGIS 2.18.17 on Linux Mint 19. I have several .gpx files of waypoints recorded using a handheld GPS device. I can load them on to QGIS or Google Earth with no problems. However, I want to be ...
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7 views

Is it possible to assign values from polygons to a new layer in an existing raster in R?

I'm a bit of an R novice and looking to see if there is any way to assign values to a raster layer based upon polygons. Some background - I am working on a mining project and have a regular grid of ...
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1answer
23 views

Select area from raster layer as a new layer

In qgis 3.4.6, I tried to select an area from a raster map, to use the cropped area as a new layer or export the cropped area as a geotiff. I'm trying to use "Raster/Extraction/Clip Raster by Extent",...
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19 views

QGIS 3.6--Error— Creation of data source failed: unable to open database file

I have been working on 3 predators' data layer files. I created a vector point shapefile for each predator prior to do a heatmap (GeoTIFF file) for each data layer file. In order to extract 50% of ...
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1answer
38 views

ArcMap 10.6: Is it possible to extract point values from points?

I've got three point shapes with different fields that I cannot seem to merge as I get ERROR 000229: cannot open 'name of shapefile'. Instead of solving this error, I wanted to try something different:...
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1answer
13 views

QGIS — Extract Values from KDE raster to orginal point data layer

After performing a heatmap on QGIS of my cheetah location dataset, I would like to extract values from my kernel density estimate (KDE) raster data layer to my orignal point data layer used to create ...
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35 views

Get a 250x250 tile around a Point in an Image

I am trying to randomly sample 250x250 pixel tiles from a big Image, let's say 40000x40000. In this case the big Image would be the Hansen Dataset. I want to sample points in which a forest loss has ...
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1answer
27 views

Extracting difference between two shapefiles (not symmetrical difference) using ArcGIS Desktop?

I have a shapefile with polygons that portray survey areas (Pink areas in picture below). I receive a new updated shapefile with additional survey areas, and thus new polygons (Green areas in ...
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36 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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47 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
128 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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1answer
52 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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55 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
27 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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42 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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0answers
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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0answers
38 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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0answers
20 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
35 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
56 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
64 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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36 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
66 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
39 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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0answers
148 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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0answers
30 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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0answers
32 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
138 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
55 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
144 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
111 views

Extracting GeoTIFF data with coordinates using R?

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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60 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
139 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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0answers
61 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
308 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: ...
2
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1answer
104 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
89 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
49 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. ...
4
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1answer
49 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
78 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
104 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
59 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
36 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
122 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
310 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
127 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 ...