> For the complete documentation index, see [llms.txt](https://dronenaksha-docs.aeromegh.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dronenaksha-docs.aeromegh.com/5.-visualization/5.3-dsm-and-dtm.md).

# 5.3 DSM and DTM

### 5.3.1 **DSM Image (Digital Surface Models)**

A digital surface model (DSM) is an elevation model that contains the elevation of the terrain as well as above-ground features such as buildings, vegetation, towers, and other infrastructure.

\-          By clicking on the DSM tab at the bottom of the screen, a small pop-up will be displayed which will show DSM & DTM tabs (as shown in the image below).

\-          You can see the DSM image by clicking on the DSM option.

<figure><img src="https://3884475046-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FtfR2aucUuR2VwDSLBUfW%2Fuploads%2FGxaK9rPtj70OpaBbiJ8S%2Fimage.png?alt=media&amp;token=d9b36eaf-eb7f-4589-8ce7-8a606ccb90b0" alt=""><figcaption><p>DSM Image</p></figcaption></figure>

### **5.3.2 DTM (Digital Terrain Model)**

In some countries, a DTM is actually synonymous with a DEM. This means that a DTM is simply an elevation surface representing the bare earth referenced to a common vertical datum. In the United States and other countries, a DTM has a slightly different meaning. A DTM is a vector data set composed of regularly spaced points and natural features such as ridges and break lines. A DTM augments a DEM by including linear features of the bare-earth terrain.

By clicking on DTM tab, you can open DTM image.

![DTM Image](https://3884475046-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FtfR2aucUuR2VwDSLBUfW%2Fuploads%2F944rlgYBidSpczIBzKOL%2FScreenshot%20from%202022-06-03%2012-42-11.png?alt=media\&token=98a032fc-a761-4b4b-b51e-60e501aa878c)