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Results tagged with landsat
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user 21692
A series of Earth-observing satellite missions jointly managed by NASA and the U.S. Geological Survey.
4
votes
3
answers
10k
views
Save rasters created by loop operation to different directory?
For one raster it is easy:
writeRaster(raster1, filename="raster1.img", format="HFA", overwrite=TRUE)
script for my loops:
# read files
setwd("D:/Data/LANDSAT")
library(raster)
library(rgdal)
# read …
- 3,386
5
votes
1
answer
630
views
Verifying landsat reflectance values? [closed]
Is there a way to automate the preprocessing of LANDSAT data?) … Why do the raw Landsat data (left) values sees to be better visually distinctive ?
Is it only a question of appearance? …
- 3,386
1
vote
1
answer
898
views
Export of group = multiband raster to another format not works in GRASS
I have a set of single layers in my PERMANENT from some Landsat images (1 Landsat = 7 one layer rasters). … I would like to export group (named "stack" in R) of these layers = forming 1 Landsat image to .img. …
- 3,386
1
vote
1
answer
872
views
Automatically georectify raw Landsat scenes
I am working with 20 raw Landsat images downloaded from GloVis, in WGS 84 (EPSG 32634) coordinate system. I need to geometrically correct them to S_JTSK (EPSG 5514). … However Landsat resolution is so poor (30x30m) that I can´t find easily these points.
In this reason I would like to know if there is some automated approach to georectify Landsat scenes? …
- 3,386
10
votes
1
answer
8k
views
Importing multiple stacked raster images in R?
I would like to import all multiple mosaic rasters (each mosaic is composed by 7 layers) from indicated folder into my R. Then access them as single multilayers rasters.
So I did:
# read all mosai …
- 3,386
0
votes
0
answers
123
views
Changing transformation of already reprojected raster in ArcGIS Desktop?
I downloaded Landsat LT5 data (origCS = GSC: WGS84, EPSG:4326) and I reprojected it to final PCS: S-JTSK (desiredCS = EPSG: 5514). … As processing of my projected rasters has taken lot of time, I don't want to start again with the raw Landsat data, and I prefer to play around with transformation of classified rasters. …
- 3,386
3
votes
2
answers
2k
views
automatically geo- and ortho- rectify raw Landsat data using DEM
I have a dataset of 20 Landsat scenes (MSS, TM, ETM+) for 20 years (one scene per year). …
- 3,386
2
votes
1
answer
1k
views
Possible to use same signature file to classify images from different years? [closed]
I have Landsat images for the same area over 20 years (one photo per year in same season). I would like to detect changes occured in forested area like clear-cut and bark beetle outbreak over time. …
- 3,386
1
vote
1
answer
447
views
Which DOS method use to convert at-sensor radiance to at-surface values in GRASS (landsat da...
I am trying to calculate surface reflectance values from raw Landsat DN data downloaded from GLOVIS. … I have imported Landsat data in GRASS 6 with header by i.landsat.import and reprojected the scene into different PCS. …
- 3,386
6
votes
automatically geo- and ortho- rectify raw Landsat data using DEM
Answer for others so confused people as I am:
To know how to deal with downloaded raw Landsat data - what else in pre-processing do I need? … If I am not wrong, my Landsat data are finally in L1T so I don´t have to orthorectify them - they have to be already ortorectified. …
- 3,386
8
votes
3
answers
4k
views
How to easily identify/classify coniferous forest from one date Landsat image?
I am pretty new in remote sensing and I am trying to identify/classify coniferous forest cover from single date Landsat scene. …
- 3,386
9
votes
2
answers
2k
views
Methodology for Hansen classification of Global Forest Watch?
I have just discovered amazing Hansen´s classification about forest loss and re-growth, available at http://www.globalforestwatch.org/, published in Science, 2013 as:
Hansen, M. C., Potapov, P. V, Moo …
- 3,386
2
votes
How to easily identify/classify coniferous forest from one date Landsat image?
SPIE 9260, Land Surface Remote Sensing II, 92601L (November 8, 2014); doi:10.1117/12.2068775
so as
FI = (B4 - B3 - 0.01)/(B4 - B3)*(1-B4)/(0.1 + B2)
where B4 represent band4 from Landsat multiband … Evaluating methods to detect bark beetle-caused tree mortality using single-date and multi-date Landsat imagery. …
- 3,386
5
votes
1
answer
359
views
Accuracy Assessment for single date classification - possible to apply to classification wit...
Aerial photos do not fully cover the extent of Landsat images (AOI). … part of fully classified Landsat by set of stratified sampling points per mapped class. …
- 3,386
3
votes
3
answers
152
views
Apply accuracy measures from partial area to the whole classified maps?
Aerial photos do not fully cover the extent of Landsat images (AOI). … part of fully classified Landsat by set of stratified sampling points per mapped class. …
- 3,386