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23 lines
1.4 KiB
Markdown
23 lines
1.4 KiB
Markdown
% INF205 Project report
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% Esther and Trygve
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% 7. May 2024
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## Group: Trygve and Esther
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# Functionality
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Our program usees the marching squares algorithm to create a vector contour map from a raster heightmap (DTM).
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It outputs a geojson file that can be read by gis software. [https://mapshaper.org/](https://mapshaper.org/) is a simple website where you can view geojson files.
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# data structures and input/output
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The HeightMap class stores the heightmap as a array on the heap. It was not nececarry to copy or move this class, so we did not implement copy or move constructors/assignment operators.
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The Point class represents a point in a line. The points are stored in vectors, wich are again stored in a big vector containing all the lines.
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The `produce_cellmap` function finds the points for a contour at a given elevation. The `create_lines` uses `produce_cellmap` the get the points and then sorts them into contiguous lines before returning a `std::vector<std::vector<Point>>`{.cpp} thats used by the function `write_output_file` to write them to a geojson file.
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# Performance
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# Functionality of special interest
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## Trygve
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I can created a blur method that performs a simple box blur on the whole heigtmap. This is usefull to smooth out noise and create a more readable output.
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I wanted to implement a gaussion blur, and the code is ready for that, but in the end we became short on time. |