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| GeoCommunity Mailing List |
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| Mailing List Archives |
| Subject: | Re: GISList: Suggestions on land cover/vegitation |
| Date: |
12/08/2001 07:03:16 PM |
| From: |
<evillige .. gmu.edu> |
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Jason,
Landcover data derived from Landsat should be considered at best a
1:100k scale data set. If the data is from Landsat7 and generated from
a resolution merged product it could be considered a 1:50k dataset.
If you are interested in finding existing data as opposed to creating
your own, that is the best you will find covering the whole US. Some
states may have better landcover derived from air photo's and cadastral
maps.
----- Original Message -----
From: David Irving <dirving@box.net.au>
Date: Saturday, December 8, 2001 5:13 pm
Subject: Re: GISList: Suggestions on land cover/vegitation
> Jason -
>
> Have you thought about using Landsat (or SPOT) imagery to produce the
> veg. overlay? The South Australian Lands Dept did this some years ago
> for their printed Topo maps, and it looked pretty good.
>
> Regards,
> David
>
> Jason Lampitt wrote:
> >
> > Hello to both lists.
> >
> > This is nearly a duplicate subject from one of my
> > previous postings only this time I'll try to be
> > frightfully specific about what I'm trying to
> > accomplish.
> >
> > First off, if you don't know already, I make trail
> > maps. For past versions of my maps I've just used USGS
> > 24K quads and overlaid my trail data, made a few
> > cosmetic adjustments and printed the product.
> >
> > Personally I don't like the final product anymore and
> > with all the available data I think I could produce a
> > much better map.
> >
> > I've pretty much got all my ducks in a row with
> > exception to land cover/vegetation representation.
> >
> > USGS vegetation DLG's are sparse, somewhat out of date
> > and haven't been produced in the last few years
> > according to a contact at USGS.
> >
> > NLCD files are HUGE and I'm still learning how to work
> > with them and since the file itself covers and entire
> > state I'm not sure if the resolution of the file will
> > warrant using it for trail maps with a scale somewhere
> > between 1:40,000 and 1:24,000.
> >
> > I know there's lots of data out there and all kinds of
> > formats so I don't really need suggestions on where to
> > get data, it's more like I need suggestions on what's
> > best to use to give a clearer representation of land
> > cover/vegetation for large scales. I'm lost in a sea
> > of data.
> >
> > I appreciate each lists' patience with my questions.
> > Everyone has been more than helpful.
> >
> > To slightly contradict myself, if you have a good
> > suggestion for my plight which includes where to get
> > the data then by all means please let me know.
> >
> > Jason Lampitt
> >
> > __________________________________________________
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> >
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> >
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