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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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1answer
17 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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0answers
29 views

Snowline extract elevation using NDSI index in Google Earth Engine [on hold]

Im try extract snowline elevation values using the NDSI index (normalized difference snow index), with the target of to know the variations of height over Landsat collection. Im new in the ...
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2answers
32 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
24 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
11 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
14 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
45 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 ...
2
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0answers
34 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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0answers
11 views

Raster-Projections-Plugin - Extract Projections not loaded

I am trying to generate a .wld file for a GeoTiff I have georeferenced in the GeoReferencer, but cannot see the 'Extract Projections' option in the menu or in the plugin list. Any ideas?
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1answer
53 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
30 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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0answers
29 views

Calculate mean value of spatial data across raster

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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0answers
38 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 ...
0
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1answer
53 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, ...
2
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0answers
39 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-...
1
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1answer
77 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
votes
1answer
56 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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0answers
62 views

Connditionally extract values from raster brick in a loop using R

Quick story I have multiple netCDFs representing different time periods, and a dataframe containing observations (point data) taken at different time periods. I would liek R to only extract data from ...
2
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1answer
47 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 ...
2
votes
1answer
36 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
38 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. ...
2
votes
1answer
44 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
30 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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0answers
24 views

Best method to extract regions from a raster into a memory buffer

I'm working on C++ applications and I'm familiar with GDAL 1.7 C/C++ API. For a new application, I'm switching to GDAL 2.2. In this application, I need to extract a region from a raster : Let's say I ...
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0answers
21 views

Extracting Multi Values to Points for Multi-band raster displaying as <NULL> in ArcMap?

I am using ArcMap 10.4.1. I am trying to use the Extract Multi Values to Points Tool to extract values from a multi-band raster to points. The tool runs fine but many of the extracted values are ...
1
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1answer
47 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 ...
1
vote
1answer
27 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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0answers
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
43 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
140 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
63 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 ...
1
vote
1answer
50 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 ...
1
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1answer
89 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 ...
1
vote
1answer
503 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 ...
1
vote
1answer
300 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 ...
1
vote
0answers
23 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 ...
3
votes
1answer
175 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
83 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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vote
0answers
163 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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votes
1answer
343 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 ...
0
votes
1answer
123 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(...
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1answer
231 views

Extract values from large rasterstack, R

I have a large rasterstack of about 500 objects. I want to sample easch object with the use of a SpatialPointDataframe and then export the results as file.csv. I have tried the following but within ...
3
votes
1answer
105 views

How to fetch polygons with top n highest temperature record in multi-layer raster data in R (with reproducible data)?

I have raster gridded data of Germany historical daily temperature observation (15 years' historical daily mean temperature observation) in RasterBrick object. Here is how my raster gridded data look ...
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0answers
40 views

Selecting .las points based on intersection with polygon in ArcGis

I'm trying to select all .las points that fall within a selected polygon. So basically like select by location, but with a .las file and a feature layer file instead of two feature layer files. I ...
-1
votes
1answer
57 views

Newbie, for GIS (need wander path, trail data) [closed]

I need Greek wander paths of places like mountains and forests as shapefiles, but I don't know how to start to extract them from specific sites or getting them ready as shapefiles. I need these data ...
0
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0answers
189 views

Downloading PRISM weather data (County-level Annual) using R?

I am trying to extract county-level annual temperature data from PRISM using the R package "PRISM". I have an error in the extraction that says: Error in .rasterObjectFromFile(x, band = band, ...
0
votes
1answer
105 views

Extract raster information from a spdf and for different buffer size in a loop

For a project in geoprocessing, I need to extract information from a raster but for different buffer sizes. I have a raster of the population (100 m size pixel) and a SpatialPolygonDataFrame with the ...
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1answer
3k views

Extract value of a raster with coordinates

i'm currently working on the distribution of different species on an area, for 23 years. I'll show you a sample of my data, it will be easier to get. My dataframe, let's call it df. x y ...
1
vote
1answer
35 views

How to extract data points based on date attributes

I have around 1.5 million data points of fire incidents during a period of 10 years. I want to extract each month into a new layer so then I will basically have 120 layers in total. Is there a way ...
3
votes
1answer
69 views

Reclassifiying a continuous raster data inside each of 4000 polygons

I have a raster data with a continuous value (from a Low 0 to a High 1). Across the whole area of the raster map, I have 4000 polygons of different shape and size. Each of these polygons is assigned a ...