# HGIS (aichgis)

## About

This is a library and command-line tool for GIS.

Currently, it generates maps and computes perimters, areas, and compactness. You
can use it to look at your congressional district for evidence of
gerrymandering.

## Installation

hgis is best installed with [stack](https://haskellstack.org/). Try

```
stack install hgis
```

or

```
stack install hgis --flag hgis:-cairo
```

to install with bindings [cairo](https://cairographics.org/) library, which will
enable outputs as PNGs.

You can also clone this repository and type `stack build` if you want to start hacking.

## Usage

### Command-line

From the command line, type

```
hgis map --output OUTPUT.svg FILE.shp
```

to read a shapefile and write an svg.

You can use e.g.

```
hgis map --output OUTPUT.svg --projection bonne FILE.shp
```

to force the use of the Bonne projection.

### Library

## Documentation

### Haddock

Haddock documentation can be accessed through hackage.