---
name: "Terrain Processor: Heightmap: ASCII DEM Convert"
type: topic
source: https://community.bistudio.com/wiki/Terrain_Processor:_Heightmap:_ASCII_DEM_Convert
revid: 349997
updated: 2023-11-20T22:11:44Z
---

# Terrain Processor: Heightmap: ASCII DEM Convert

#### Task details

**Task name** : Heightmap: Create from Geodetic .asc

**Dll plugin name** : BITasksPlugin.dll

**Geometry type** : None

**Heightmap** : Yes

#### Description

Algorithm creates UTM ASCII heightmap from geodetic .ASC digital elevation models.

- **Orange**  - regular **geodetic** heightmap
- **Blue** - new terrain **UTM** heightmap

#### Task parameters

- **Easting** - UTM easting coordinate
- **Northing** - UTM northing coordinate
- **Zone** - UTM zone
- **Hemisphere** - UTM hemisphere (Northern, Southern)
- **Rows & columns count** - Rows and columns count
- **Cell size** - Cell size in meters.

#### Usage

Conversion tool, creating UTM heightmap from Geodetic heightmap.

#### Algorithm

1. Load geodetic ASCII DEM.
1. Prepare heightmap with size and position in UTM.
1. For each cell in heightmap:
   1. Get its UTM coordinate
   1. Convert UTM coordinate to geodetic coordinate.
   1. Get height from geodetic ASCII heightmap with bi-cubic spline function.

<sub>Source: [BI Community Wiki — Terrain Processor: Heightmap: ASCII DEM Convert](https://community.bistudio.com/wiki/Terrain_Processor:_Heightmap:_ASCII_DEM_Convert) (revision 349997).</sub>