Maps Are Beautiful

Right?

... but we're using this

Clutter

Redistricting

map

How does it work?

• 

  District Hover

• 

  District Base

• 

  Base Layer

How Quadtrees Work

... and we end up with

So where'd you get the tiles?

We wrote our own mapping server.

(For kicks mostly)

In C!

  ...

  simplet_map_t*
  simplet_map_new(){
    simplet_init();
    simplet_map_t *map;
    if(!(map = malloc(sizeof(*map))))
      return NULL;

    if(!(map->layers = simplet_list_new())){
      free(map);
      return NULL;
    }

    map->bounds       = NULL;
    map->proj         = NULL;
    map->bgcolor      = NULL;
    map->error.status = SIMPLET_OK;
    map->height       = 0;
    map->width        = 0;
    map->valid        = SIMPLET_OK;
    return map;
  }
  ...
  

The API

  #include <simple-tiles/simple_tiles.h>

  int
  main(){
    simplet_map_t *map;
    if(!(map = simplet_map_new()))
      exit(1);

    simplet_map_set_slippy(map, 0, 0, 0);
    simplet_map_add_layer(map, "../data/ne_10m_admin_0_countries.shp");
    simplet_map_add_filter(map, "SELECT * from 'ne_10m_admin_0_countries'");
    simplet_map_add_style(map, "weight", "0.1");
    simplet_map_add_style(map, "fill",   "#061F3799");
    if(simplet_map_is_valid(map))
      simplet_map_render_to_png(map, "./out.png");
    simplet_map_free(map);
  }
  

In Ruby!

    require 'simpler_tiles'

    map = SimplerTiles::Map new do |m|
      m.slippy 0, 0, 0
      m.add_layer  "../data/ne_10m_admin_0_countries.shp"
      m.add_filter "SELECT * from 'ne_10m_admin_0_countries'"
      m.styles "weight" => "0.1",
                 "fill" => "#061F3799"
    end
    map.to_png