All Questions
Tagged with georeferencing r
13 questions
10
votes
2
answers
19k
views
Create a raster with georeferenced information in R
Referring to my previous question, how do I "geocode"/convert - using R - a generated raster image to a format that can be shown as a layer on a map? In short, I'm aiming to recreate the results of ...
- 629
10
votes
1
answer
461
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Georeferencing Museum specimens with poor locality descriptions
I am currently collating a list of specimens from databases of various natural history museums for further research. However, a well known issue associated with majority of historical data is the lack ...
- 1,342
5
votes
2
answers
2k
views
Seeking QGIS affine equation?
I am at the mercy of a govt authority who have provided utility information in a cad format with a 0,0 origin and a nonsense grid. About a dozen files, the grid and origin are entirely arbitrary.
To ...
- 3,520
5
votes
2
answers
3k
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Georeferencing in R Based on the Four Corners
I have a raster image (photograph) that was taken from a helicopter. Along with that raster image, the system also tells me the positions of the four corners of the image in a different file. I have ...
- 251
4
votes
1
answer
292
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How to stack rasters for ecological analysis?
The attached image shows two different forest openings. Each opening has the following layers associated with it:
Point shapefile 1 = A red X which represent a large "legacy" tree in the gap
Point ...
- 51.8k
2
votes
2
answers
1k
views
Compressing georeferenced images
I have a bunch of georeferenced TIFF images created in QGIS. The person creating them saved them as uncompressed (around 1 GB each).
I would like to compress them as LZW to save space.
How can I do ...
- 289
2
votes
0
answers
305
views
create neighborhood list in R with large dataset
I want to create a weight matrix based on distance. My code for the moment looks as follows and functions for a smaller sample of the data. However, with the large dataset (569424 individuals in 24077 ...
- 21
2
votes
1
answer
92
views
Aggregating georeferenced point data to conflicts site using R
I have a question with regard to joining to datasets.
On the one hand I have information about the location of a conflict regarding its lat/long, radius, and area and how it changes over time. Here ...
- 63
1
vote
0
answers
34
views
Batch georeferencing of aerial imagery above the ocean using R
I am working with aerial imagery collected above open water. The raw images are not georeferenced. I am using the closest position recorded by the aircraft (based on timestamps) as the coordinate for ...
- 111
1
vote
0
answers
101
views
Georeferencing rasters using GCPs in R: stars/terra equivalent of gdal_translate / gdalwarp?
With the retirement of rgdal and transition to sf/stars/terra functions in October 2023 now passed, is there a way of georeferencing raster images with GCPs (Ground Control Points) other than using ...
- 15
1
vote
0
answers
178
views
Exporting kernel utilization distributions from R to be used in ArcGIS Pro scene view
I have used the "kde" function "ks" package to estimate 95% kernel utilization distributions (KUD) to visualize the 3D activity range of an arboreal snake.
Below is code that I modified from ...
- 11
0
votes
1
answer
632
views
Georeferencing an image in R. When I change the extent, x and y resolutions become different
I am georeferencing a number of images using R. I can read the image in fine, and set an extent:
library(raster)
library(rgdal)
library(maptools)
## Read in the image as a raster
my.raster <- ...
- 1
0
votes
2
answers
305
views
How to keep spatial information after raster processing of satellite data in r
In R raster package i write an image in tiff format after certain raster processing but the spatial information is missing of new image. That's why i have to geo-reference the image again. How this ...