Need to compare and contrast the image analysis capabilities and potential of ArcGIS and ERDAS software. Please explain or recommend useful litetature.
Depends on the task. My tool bag next to my desk has seven different types of hammers, from a small spherical headed one for tiny brads in finishing work up to a sledge for busting up concrete.
Michael John Patrick I am most concerned about classification techniques.
Well, if one considers the total inventory of tools with their various options for all imaging / GIS applications like ERDAS, Envi, ArcGIS, Qgis/GRASS, etc. that narrows it down to about a couple thousand options : -) ... without considering programatic access through those to R and Python Libraries, and not to mention Google Earth Engine.
The 'potential' aspect: Any choice usually depends on the total work flow, including pre- and post- processing, and where the end product needs to be delivered, and how much iteration, your skill level - 90% ( a made up number ) of algorithms are common to all platforms ( like NDVI ), another 5% are shared between at least some of the possibilities but not all, and there are a few which are unique to a given choice.
Another factor is what you have available and will have available if your circumstances change ( a school might have an ESRI site license, but what about after graduation? ). Collaboration and access to assistance is another factor, certain domains and research specialties tend to favor certain pipelines, including some obscure ones that haven't been upgraded for decades. There is an investment in the learning curve.
For instance, if your end product and project was to support a health layer on the https://nsdi.gov.lk/faq , they have a best practice ( see graphic ).
Then there is the data - there is a vast number of platforms, sensors, bands, and modes - some applications have dedicated plugins which really simplify the import of these from source files,which understand the fiddly little nuances that sometimes occur.
I don't mean to snow you under a bunch of complexity, just attempting to refine your question. If you are classifying mangrove landcover ( Article Observation and Monitoring of Mangrove Forests Using Remote ...
) might be a different approach than land cover of urban areas in the water shed feeding those forests.
Dear Michael John Patrick sir, thank you very much for the information.
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