5 replies to this topic

[LenHoffman]

I've been placed incharge of finding high quality NCLD for the county that I work for so far I've been able to find 1:250000 however this is good for County level work. We would like to get the best possible (1:24000- 1:10000) however I guess 1:50000 would be ok any suggestions/links. I know we could create the data however we don't have the manpower or time to do so (we probably will use comercial data and then add to it.

Thank Folks

Linwood

[Martin Gamache]

Check the USGS Seamless server, they distribute the 1992 NLCD at 25m resolution for the entire country and are starting to have 2001 data available for some parts of the country(Web Site here). It is derived from Landsat imagery and is pretty good for a free product.

mg

Edited by Alpine Mapping Guild, 08 November 2005 - 05:34 PM.

[LenHoffman]

Thanks I'll have to check it out.

You said for free data that implies that there is better quality out there for sale- yes? any links for them I believe that we would probably consider them if the price was reasonable.

Len

[Matthew Hampton]

What state/county are you in? If you are a west-coaster NOAA has a good landcover dataset from their CCAP program. It will eventually become part of the 2001 NLCD - but if you can't wait it's a start.

If you are looking into change analysis, the bonus of CCAP is that it's on a 5-year program. CCAP (NLCD) is fine for a level II classification (Anderson), but you'll need better resolution imagery if you want to capture more than ~20 classes.

If you have $$$ then talk to Space Imaging (perhaps I should have added another $). I think they are starting to peddle 5m russian imagery and have the potential to classify it for a small [sic] fee.
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Matthew

[LenHoffman]

I'm sorry I haven't been on here for a little bit had some businees that has kept me very pre-occupied.

To answer the question of where I am -- Bedford Virginia and I used the USGS data for a quick and dirty but I thought there was some Land cover pre-existing out there for purchase ( High Qual ) maybe I'm mistaken.

Len

[GISRox]

Would anyone be interested in sharing an ArcMap 9.1 layer file to display a NLCD dataset?

Thanks in advance.