Collecting and interpreting information about the environment and the surface of the earth from a distance, primarily by sensing radiation that is naturally emitted or reflected by the earth's surface or from the atmosphere, or by sensing signals transmitted from a device and reflected back to it.
8
votes
3answers
1k views
Land Cover Feature Extraction from Satellite Imagery
I'm interested in a low-cost or open source solution for creating land cover GIS layers that utilize both spectral and textural extraction algorithms. I have used PCI Geomatica, ENVI, and Feature ...
18
votes
6answers
569 views
Machine Learning Algorithms for Land Classification
I am interested in learning what software exists for land classification using machine learning algorithms (e.g. k-NN, Random Forest, decision trees, etc.) I am aware of the randomForest package in R ...
11
votes
2answers
1k views
Is there a way to automate the preprocessing of LANDSAT data?
I'm currently enrolled in a remotesensing course, using LANDSAT data.
Part of my course is about standardizing the scenes based on radiance values. I assume that because this is such a tedious task, ...
7
votes
3answers
2k views
free GIS software that can orthorectify?
Would someone care to recommend a free and/or open source GIS application that can orthorectify map images?
18
votes
9answers
2k views
Which Tools do you use for Classification of Remote Sensing Data?
Which tool do you prefer to use for classification of remote sensing data, e.g. classifying land use, and why?
Which other tools have you tried, and why did you decide against them?
12
votes
8answers
774 views
Is there a smartphone app for mobile asset logging?
I'm after a recommendation for a smartphone app (iPhone or Android) to log asset information for litter bins. I need the following features
GPS
geotagged photos
Form with drop down menus for user ...
12
votes
3answers
360 views
Alternative vegetation indices
I have been using NDVIs with limited success to identify trees in the central Great Plains region of the USA. The problem I have been encountering is that reflectance from farm fields/pastures have ...
5
votes
2answers
379 views
Moisture Interpretation from Landsat Images
I am working on a "land suitability for crop" project. Can anyone let me know how to get any type of information which can be related to moisture index of soil?
I have Landsat 5 data with band 3 and ...
4
votes
1answer
263 views
Statistical analyses for survey against raster?
I am somewhat of a newbie to geostatistical analyses, but pretty
familiar with GIS and remote sensing packages. I was wondering if
anyone had suggestions on appropriate geostatistical analyses for a
...
3
votes
6answers
1k views
shadow simulation from buildings
is it possible to use hillshade function in ArcMap to calculate shadow areas of buildings or simulate shadows of buildings, using DSM of the buildings and the sun angle and azimuth?
3
votes
3answers
663 views
Problem with NDVI image value
I'm really happy to find this website. It is very helpful for the learners of Arcgis.
Now I wanna ask a question. When i open NDVI image in ENVI, its value is still within the range (-1 to 1). But ...
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