Where can i download slope and Aspect data from so i can reclassify it? Thanks

[JoshDowding]

I'm looking to locate an ideal position by creating a cross over with the perfect slope angle and aspect so that the location is sheltered from prevailing winds. how do I get the information to do this?

Thanks

[NeilAyres]

It depends where is your study area.

But generally you will need a dem (digital elevation model) from which slope and aspect can be derived.

A common source is the aster dem. Widely available for download.

Do you have spatial analyst?

[RebeccaStrauch__GISP]

A good starting point for your search may be Digital Elevation Model (DEM) Discovery Portal | NCEI

Or DEM Discovery Portal Map | ngdc.noaa.gov

also USGS SDTS format Digital Elevation Model data (DEM)   With info about there downloads USGS SDTS format Digital Elevation Model data (DEM)

GISDataDepot "Premium" Download Pipe! - In order to access and download data GISDataDepot users are required to have a GeoCommunity account. Many data types of data (DEM, NWI, DLG, LU/LC, and TIGER) are available for free download (Green icon). Most other data products (DRG, DOQ, DOQQ, FEMA) will require account holders to purchase data "blocks" for a nominal fee using their account.