create Slope and hillshade from Landsatellite image

[RajendranVijayalakshmi]

I need to create Slope and Hillshade for an area, the things i have are land satellite image of the area and Arcgis 10. please guide me how to do it using the available things

[DanPatterson_Retired]

Totally not possible, you need an elevation file (DEM) for your area.  Return when you have one and not an image of the area.  Best of luck

[RajendranVijayalakshmi]

Thank you for your quick reply, but can you guide me how to get the elevation file (DEM) for my area.

[DanPatterson_Retired]

Google, Chrome search, your local government might have data, otherwise, you are out of luck unless you want to buy data

[EricRice]

Esri publishes worldwide elevation data for free, and includes products like slope, aspect, and hillshade dynamically.  See, What are the World Elevation services?

Best,
Eric

[RajendranVijayalakshmi]

I cant access the World Elevation data, it shows this error, http://www.arcgis.com/home/error.html?c=InvalidGroup

[EricRice]

Go here:

http://www.arcgis.com/home/group.html?id=ac62a64368954d2a832e05697ba0340f

Join the group.  Then you should have access.

Note, access to these services will be changing somewhere in the 1-2 month horizon.  By joining the group you ensure you receive notifications about the upcoming changes.  My understanding is that they will remain 'free', but other requirements will have to be met for them to remain free.  I'm not actually involved in managing these services so it's best to rely on the groups communication to group members.

Best,
Eric