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Image classification software/add on for GIS software

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#1
Darren Rattai

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Hello,

 

We are currently working on a project with a very large area and subsequently huge high res imagery dataset.  Part of the project will be to classify the imagery so that we can effectively identify all sloughs and creeks as the usual suspects for free data do not provide us the accuracy we need for these features.  Does anyone know of any cost-effective software out there that does an adequate job of this task?  We use ESRI ArcGIS for most GIS work, but are not opposed to using any open source softwares to complete this.

Thanks,

Darren



#2
frax

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Darren, why not use the software you have at hand, if you are familiar with it? ArcGIS should be able to handle large imagery datasets, you can use mosaics, raster catalog and ArcSDE (and ArcGIS Server) as well as image pyramids.

 

I am sure you can use something like QGis as well, but another non-free software (although inexpensive compared to ArcGIS) is GlobalMapper - GM is very fast with large imagery (that is what it was designed for originally).


Hugo Ahlenius
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#3
Darren Rattai

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ArcGIS is not up to the task unfortunately...this is high res data for a huge area, hundreds of GBs in size.  We will give Global Mapper a shot as we have licenses for that.

Thanks for your input,

Darren



#4
David Medeiros

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Erdas Imagine and Idrisi are remote sensing programs designed to perfrom this kind of raster re class analysis. Also GRASS (which I think runs in Q GIS as well).

 

You might also take a look at becoming a trusted tester for Google Earth Engine. It can perform some of these large raster operations in the blink of an eye.

 

Alternatively you can optimize the process in Arc by down sampeling to the coarsest resolution you can accept and/or breaking the area up into managable tiles and re assemble after the classification process is complete.

 

Using python to run tool outside of ArcMAP can also greatly increase the size of files you can work on and reduce the time it takes to process them.


GIS Reference and Instruction Specialist, Stanford Geospatial Center.

 

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#5
frax

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ArcGIS is not up to the task unfortunately...this is high res data for a huge area, hundreds of GBs in size.  We will give Global Mapper a shot as we have licenses for that.

Thanks for your input,

Darren

I still think ArcGIS should be up for the task... !


Hugo Ahlenius
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