contour-creator/documentation/report.md

## Group: Trygve and Esther
# Functionality
Our program usees the marching squares algorithm to create a vector contour map from a raster heightmap.
The cli interface is `gdal_contour [OPTIONS] <src_filename> <dst_filename>` with these options:
```
-i <elevation intervall>    Interval between contours
-f <format>                 Fileformat to output
```
# data structure and input/output
![](ER_diagram.svg)
# Responsibilities:
Esther will create the algorithm itself with multitreading. This will essentially be a function that takes a grid of pixels as input and returns a similar grid of cells.
Trygve will take care of reading in the tiff file into our own datastructure and creating a vector image from the output of the algorithm.

# How do you plan to make it easily verifiable that your objectives are reached?
We can compare against the `gdal_contour` cli program which is a implementation widely used in other software. We can compare speed, memory usage and the result itself.
Each step in our program also produces a output which we can be worked on and evaluated independently.