DTM AND DSM

[tinigjeo]

how could import  dtm and dsm on gis 10.4.1?

[tinigjeo]

why I cannot create slope map ect ?

[DanPatterson_Retired]

Because Xander said it is not a file that contains raw elevation data.  He said it is classified, hence it isn't in its original form and can't be used for the purpose for which you want

[XanderBakker]

Simple, the raster does not represent the surface. It is classified and as such an derivative will be incorrect. Let me show this visually:

The upper part is the DEM/DTM with a continuous scale of colors, however you see the "breaks" in the values since it is classified data. The lower part is the slope. Large areas are flat and only at the part where the class changes the slope has high values.

[tinigjeo]

can you help with  video  

[DanPatterson_Retired]

YouTube in general, and the ESRI channel there have lots of videos.  Perhaps you can find something there on DEM basics that suits your learning style

[XanderBakker]

In additional to YouTube videos, if you are on maintenance you have access to a lot of resources on the training site:

https://www.esri.com/training/catalog/search/ 

Just search for "raster" and mark ArcMap and ArcGIS Pro:

... and you will get a large list of course material (most of them are free).

For instance:

https://www.esri.com/training/catalog/57630435851d31e02a43f084/deriving-rasters-for-terrain-analysis...  and https://www.esri.com/training/catalog/57630436851d31e02a43f18f/terrain-analysis-using-arcgis-pro/ will tell you how to perform terrain analysis. 

Perhaps it would be good to start with: https://www.esri.com/training/catalog/57630431851d31e02a43ee4f/basics-of-raster-data/ and https://www.esri.com/training/catalog/57630437851d31e02a43f252/displaying-raster-data-using-arcgis/ 

Additionally there is a tutorial for Spatial Analyst About the ArcGIS Spatial Analyst Tutorial—ArcGIS Help | ArcGIS Desktop 

[tinigjeo]

WHY THE VIDEO CAN NOT OPEN ?

[DanPatterson_Retired]

which video?

are there any restrictions on you accessing web materials?

[tinigjeo]

ALL VIDEO OF TRAINING THAT I WANT TO SEE FOR EXAMPLE 

SEE FIG 

[XanderBakker]

Strange, all media links open for me:

Since the links includes an ID, perhaps these are different per user. So follow the steps provided (if you haven't already):

• go to https://www.esri.com/training/catalog/search/
• Make sure you are logged in
• search for raster and select ArcMap and/or ArcGIS Pro
• then open a result.