a rust tui to view amtrak train status
Add rivers, cities; swap station/train markers
- Rivers from Natural Earth 50m rendered as subtle blue lines
- 142 cities with population-based progressive disclosure:
>2M at wide zoom, >30K when zoomed in tight
- Swap markers: stations are now small · dots, trains are ○ circles
(◉ when selected) — trains stand out, stations recede
- 7-layer rendering order: coastlines, rivers, state boundaries,
city labels, Amtrak routes, stations, trains
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
+123
-12
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data/cities.json
+1
data/cities.json
···
1
+
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data/rivers.json
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data/rivers.json
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6.135,52.722],[-106.103,52.808],[-106.054,52.873],[-105.903,52.932],[-105.651,52.983],[-105.497,53.046],[-105.442,53.122],[-105.373,53.153],[-105.289,53.139],[-105.201,53.159],[-105.065,53.24]]},"properties":{"name":"South Saskatchewan"}},{"type":"Feature","geometry":{"type":"LineString","coordinates":[[-116.422,51.667],[-116.357,51.651],[-116.319,51.612],[-116.271,51.51],[-115.86,51.273],[-115.658,51.194],[-115.53,51.194],[-115.414,51.159],[-115.312,51.09],[-115.1,51.103],[-114.781,51.198],[-114.48,51.196],[-114.197,51.094],[-114.041,50.999],[-114.01,50.909],[-113.94,50.85],[-113.832,50.825],[-113.581,50.799],[-113.447,50.813],[-113.31,50.848],[-113.19,50.838],[-113.088,50.783],[-113.003,50.767],[-112.933,50.788],[-112.809,50.789],[-112.632,50.77],[-112.524,50.729],[-112.485,50.665],[-112.444,50.631],[-112.4,50.626],[-112.357,50.574],[-112.316,50.475],[-112.263,50.422],[-112.197,50.415],[-112.168,50.393],[-112.173,50.355],[-112.101,50.238],[-112.031,50.205],[-111.941,50.204],[-111.825,50.176],[-111.684,50.121],[-111.609,50.065],[-111.6,50.01],[-111.643,49.937],[-111.607,49.904],[-111.422,49.934],[-111.342,50.001],[-111.264,50.041],[-111.188,50.055],[-110.775,50.046],[-110.66,50.059],[-110.681,50.095],[-110.664,50.12],[-110.58,50.155],[-110.577,50.185],[-110.632,50.235],[-110.632,50.299],[-110.594,50.404],[-110.529,50.448],[-110.436,50.433],[-110.391,50.463],[-110.393,50.537],[-110.344,50.59],[-110.158,50.661],[-110.084,50.714],[-110.054,50.754],[-110.068,50.781],[-110.054,50.81],[-109.998,50.863],[-110.011,50.884],[-109.897,50.938],[-109.188,51.004],[-108.925,51.002],[-108.846,50.965],[-108.576,50.925],[-108.441,50.858],[-108.326,50.737],[-108.203,50.672],[-108.006,50.658]]},"properties":{"name":"South Saskatchewan"}},{"type":"Feature","geometry":{"type":"LineString","coordinates":[[-120.882,42.4],[-121.048,42.441],[-121.437,42.482],[-121.604,42.525],[-121.679,42.583],[-121.776,42.579],[-121.889,42.512],[-121.921,42.475]]},"properties":{"name":"Sprague"}},{"type":"Feature","geometry":{"type":"LineString","coordinates":[[-82.417,43.017],[-82.488,42.74],[-82.545,42.625],[-82.645,42.558]]},"properties":{"name":"St. Clair"}},{"type":"Feature","geometry":{"type":"LineString","coordinates":[[-74.709,45.004],[-74.857,45.004],[-74.996,44.97],[-75.179,44.899],[-75.401,44.772],[-75.792,44.497]]},"properties":{"name":"St. Lawrence"}},{"type":"Feature","geometry":{"type":"LineString","coordinates":[[-87.7,34.773],[-87.814,34.763],[-87.965,34.844],[-88.191,35.012],[-88.306,35.126],[-88.311,35.185],[-88.282,35.239],[-88.188,35.329],[-88.19,35.366],[-88.139,35.391],[-87.994,35.418],[-88.018,35.434],[-87.986,35.511],[-87.987,35.579],[-88.02,35.67],[-88.01,35.767],[-87.943,35.925],[-87.975,35.945]]},"properties":{"name":"Tennessee"}},{"type":"Feature","geometry":{"type":"LineString","coordinates":[[-83.969,35.87],[-84.344,35.736],[-84.4,35.743],[-84.457,35.775],[-84.542,35.863],[-84.598,35.803],[-84.63,35.789],[-84.656,35.803],[-84.82,35.566],[-84.862,35.559],[-84.89,35.528],[-84.902,35.472],[-84.924,35.45],[-84.957,35.461],[-85.013,35.391],[-85.092,35.242],[-85.182,35.132],[-85.285,35.062],[-85.347,35.05],[-85.367,35.095],[-85.392,35.096],[-85.424,35.055],[-85.46,35.05],[-85.501,35.081],[-85.559,35.08],[-85.635,35.049],[-85.839,34.803],[-86.115,34.528],[-86.294,34.403],[-86.378,34.427],[-86.462,34.478],[-86.546,34.557],[-86.666,34.591],[-86.899,34.575]]},"properties":{"name":"Tennessee"}},{"type":"Feature","geometry":{"type":"LineString","coordinates":[[-88.283,37.022],[-88.472,37.088]]},"properties":{"name":"Tennessee"}},{"type":"Feature","geometry":{"type":"LineString","coordinates":[[-83.356,34.708],[-83.167,34.6]]},"properties":{"name":"Tugaloo"}},{"type":"Feature","geometry":{"type":"LineString","coordinates":[[-100.344,22.117],[-99.993,21.945],[-99.902,21.864],[-99.84,21.756],[-99.782,21.703],[-99.73,21.705],[-99.665,21.664],[-99.621,21.673],[-99.559,21.719],[-99.46,21.719],[-99.324,21.672],[-99.191,21.699],[-99.06,21.799],[-98.952,21.851],[-98.868,21.855],[-98.807,21.89],[-98.769,21.957],[-98.728,21.988],[-98.59,21.981]]},"properties":{"name":"Verde"}},{"type":"Feature","geometry":{"type":"LineString","coordinates":[[-84.755,40.359],[-84.647,40.356],[-84.639,40.371],[-84.757,40.44],[-84.759,40.525],[-84.794,40.567],[-84.886,40.588],[-85.007,40.65],[-85.156,40.752],[-85.317,40.826],[-85.49,40.872],[-85.677,40.863],[-85.877,40.801],[-86.113,40.763],[-86.383,40.75],[-86.618,40.66],[-86.818,40.494],[-86.955,40.412],[-87.029,40.415],[-87.117,40.39],[-87.404,40.214],[-87.445,40.127],[-87.438,40.018],[-87.419,39.941],[-87.388,39.895],[-87.378,39.808],[-87.413,39.568],[-87.452,39.467],[-87.507,39.392],[-87.579,39.344],[-87.611,39.291],[-87.603,39.234],[-87.615,39.193],[-87.647,39.169],[-87.632,39.107],[-87.568,39.007],[-87.53,38.909],[-87.518,38.812],[-87.529,38.742],[-87.584,38.679],[-87.636,38.543],[-87.681,38.488],[-87.735,38.47],[-87.784,38.419],[-87.827,38.336],[-87.873,38.295],[-87.921,38.298],[-87.957,38.282],[-87.98,38.249],[-87.977,38.214],[-87.949,38.178],[-87.958,38.144],[-88.006,38.113],[-87.99,38.089],[-88.026,38.06],[-88.045,38.013],[-88.043,37.937],[-88.059,37.898],[-88.091,37.897],[-88.095,37.876],[-88.042,37.789]]},"properties":{"name":"Wabash"}},{"type":"Feature","geometry":{"type":"LineString","coordinates":[[-122.095,43.422],[-122.219,43.485],[-122.371,43.515],[-122.424,43.574],[-122.427,43.672],[-122.458,43.746],[-122.517,43.795],[-122.96,44.024],[-123.119,44.15],[-123.184,44.323],[-123.22,44.513],[-123.189,44.599],[-123.103,44.644],[-123.077,44.68],[-123.112,44.707],[-123.116,44.747],[-123.09,44.802],[-123.098,44.836],[-123.14,44.849],[-123.124,44.887],[-123.05,44.947],[-123.024,44.999],[-123.046,45.042],[-123.036,45.081],[-122.993,45.117],[-122.987,45.157],[-123.018,45.202],[-123.016,45.238],[-122.981,45.267],[-122.902,45.288],[-122.718,45.306],[-122.621,45.368],[-122.603,45.427],[-122.634,45.502],[-122.677,45.56],[-122.732,45.603],[-122.745,45.649],[-122.726,45.674]]},"properties":{"name":"Willamette"}},{"type":"Feature","geometry":{"type":"LineString","coordinates":[[-94.615,49.993],[-94.651,50.024],[-94.639,50.101],[-94.668,50.135],[-94.809,50.15],[-94.931,50.131],[-94.999,50.141],[-95.013,50.18],[-95.179,50.261],[-95.207,50.34],[-95.276,50.366],[-95.398,50.369],[-95.506,50.323],[-95.6,50.228],[-95.726,50.17],[-95.883,50.148],[-95.987,50.148],[-96.036,50.168],[-96.052,50.205],[-96.026,50.283]]},"properties":{"name":"Winnipeg"}},{"type":"Feature","geometry":{"type":"LineString","coordinates":[[-95.989,50.404],[-96.005,50.451],[-96.295,50.625]]},"properties":{"name":"Winnipeg"}},{"type":"Feature","geometry":{"type":"LineString","coordinates":[[-81.576,36.074],[-81.522,36.047],[-81.465,36.055],[-81.349,36.106],[-80.899,36.225],[-80.674,36.259],[-80.464,36.232]]},"properties":{"name":"Yadkin"}},{"type":"Feature","geometry":{"type":"LineString","coordinates":[[-72.991,46.177],[-73.079,46.16],[-73.146,46.124],[-73.177,46.071],[-73.164,46.044]]},"properties":{"name":null}}]}
+61
-2
src/geo.rs
+61
-2
src/geo.rs
···
1
-
// Geographic data layers: state boundaries and route lines
2
-
// Parsed from embedded GeoJSON at compile time.
1
+
// Geographic data layers: state boundaries, route lines, rivers, and cities
2
+
// Parsed from embedded GeoJSON/JSON at compile time.
3
3
4
4
use anyhow::{Context, Result};
5
5
···
10
10
pub name: String,
11
11
}
12
12
13
+
/// A city/populated place.
14
+
#[derive(Debug, Clone)]
15
+
pub struct City {
16
+
pub name: String,
17
+
pub lon: f64,
18
+
pub lat: f64,
19
+
pub population: u64,
20
+
}
21
+
13
22
/// All static geographic layers for rendering.
14
23
#[derive(Debug, Clone)]
15
24
pub struct GeoLayers {
16
25
pub state_boundaries: Vec<LineSegment>,
17
26
pub routes: Vec<LineSegment>,
27
+
pub rivers: Vec<LineSegment>,
28
+
pub cities: Vec<City>,
18
29
}
19
30
20
31
// Embed the data files at compile time
21
32
const STATES_JSON: &str = include_str!("../data/us-states.json");
22
33
const ROUTES_JSON: &str = include_str!("../data/routes.json");
34
+
const RIVERS_JSON: &str = include_str!("../data/rivers.json");
35
+
const CITIES_JSON: &str = include_str!("../data/cities.json");
23
36
24
37
impl GeoLayers {
25
38
pub fn load() -> Result<Self> {
26
39
let state_boundaries = parse_states(STATES_JSON)?;
27
40
let routes = parse_routes(ROUTES_JSON)?;
41
+
let rivers = parse_routes(RIVERS_JSON)?; // same format as routes
42
+
let cities = parse_cities(CITIES_JSON)?;
28
43
Ok(Self {
29
44
state_boundaries,
30
45
routes,
46
+
rivers,
47
+
cities,
31
48
})
32
49
}
33
50
}
···
108
125
Ok(segments)
109
126
}
110
127
128
+
fn parse_cities(json: &str) -> Result<Vec<City>> {
129
+
let data: Vec<serde_json::Value> =
130
+
serde_json::from_str(json).context("failed to parse cities JSON")?;
131
+
132
+
Ok(data
133
+
.iter()
134
+
.filter_map(|c| {
135
+
Some(City {
136
+
name: c["name"].as_str()?.to_string(),
137
+
lon: c["lon"].as_f64()?,
138
+
lat: c["lat"].as_f64()?,
139
+
population: c["pop"].as_u64().unwrap_or(0),
140
+
})
141
+
})
142
+
.collect())
143
+
}
144
+
111
145
#[cfg(test)]
112
146
mod tests {
113
147
use super::*;
···
124
158
layers.routes.len() > 100,
125
159
"should have 100+ route segments, got {}",
126
160
layers.routes.len()
161
+
);
162
+
assert!(
163
+
layers.rivers.len() > 50,
164
+
"should have 50+ river segments, got {}",
165
+
layers.rivers.len()
166
+
);
167
+
assert!(
168
+
layers.cities.len() > 100,
169
+
"should have 100+ cities, got {}",
170
+
layers.cities.len()
127
171
);
128
172
}
129
173
···
143
187
let layers = GeoLayers::load().unwrap();
144
188
let named = layers.routes.iter().filter(|r| !r.name.is_empty()).count();
145
189
assert!(named > 100, "most routes should have names");
190
+
}
191
+
192
+
#[test]
193
+
fn test_cities_sorted_by_population() {
194
+
let layers = GeoLayers::load().unwrap();
195
+
assert_eq!(layers.cities[0].name, "New York");
196
+
assert!(layers.cities[0].population > layers.cities.last().unwrap().population);
197
+
}
198
+
199
+
#[test]
200
+
fn test_rivers_have_points() {
201
+
let layers = GeoLayers::load().unwrap();
202
+
for seg in &layers.rivers {
203
+
assert!(seg.points.len() >= 2, "river should have at least 2 points");
204
+
}
146
205
}
147
206
}
+60
-10
src/ui.rs
+60
-10
src/ui.rs
···
145
145
.map(|g| segments_to_lines(&g.routes, Color::Rgb(60, 80, 140)))
146
146
.unwrap_or_default();
147
147
148
+
let river_lines = app
149
+
.geo
150
+
.as_ref()
151
+
.map(|g| segments_to_lines(&g.rivers, Color::Rgb(30, 50, 80)))
152
+
.unwrap_or_default();
153
+
154
+
// Cities visible based on zoom level and population
155
+
let city_labels: Vec<(f64, f64, String)> = app
156
+
.geo
157
+
.as_ref()
158
+
.map(|g| {
159
+
let min_pop = if vp_width > 40.0 {
160
+
2_000_000 // zoomed out: only major cities
161
+
} else if vp_width > 20.0 {
162
+
500_000
163
+
} else if vp_width > 10.0 {
164
+
100_000
165
+
} else {
166
+
30_000 // zoomed in: most cities
167
+
};
168
+
g.cities
169
+
.iter()
170
+
.filter(|c| c.population >= min_pop)
171
+
.filter(|c| vp.contains(c.lon, c.lat))
172
+
.map(|c| (c.lon, c.lat, c.name.clone()))
173
+
.collect()
174
+
})
175
+
.unwrap_or_default();
176
+
148
177
let canvas = Canvas::default()
149
178
.block(
150
179
Block::default()
···
161
190
// Layer 1: Coastlines (built-in ratatui world map)
162
191
ctx.draw(&Map {
163
192
resolution: MapResolution::High,
164
-
color: Color::Rgb(40, 40, 50),
193
+
color: Color::Rgb(35, 38, 45),
165
194
});
166
195
167
-
// Layer 2: State boundaries
196
+
// Layer 2: Rivers
197
+
for &(x1, y1, x2, y2, color) in &river_lines {
198
+
ctx.draw(&CanvasLine {
199
+
x1,
200
+
y1,
201
+
x2,
202
+
y2,
203
+
color,
204
+
});
205
+
}
206
+
207
+
// Layer 3: State boundaries
168
208
for &(x1, y1, x2, y2, color) in &state_lines {
169
209
ctx.draw(&CanvasLine {
170
210
x1,
···
175
215
});
176
216
}
177
217
178
-
// Layer 3: Amtrak routes
218
+
// Layer 4: City labels
219
+
for (lon, lat, ref name) in &city_labels {
220
+
ctx.print(
221
+
*lon,
222
+
*lat,
223
+
Span::styled(name.clone(), Style::default().fg(Color::Rgb(70, 70, 85))),
224
+
);
225
+
}
226
+
227
+
// Layer 5: Amtrak routes
179
228
for &(x1, y1, x2, y2, color) in &route_lines {
180
229
ctx.draw(&CanvasLine {
181
230
x1,
···
186
235
});
187
236
}
188
237
189
-
// Layer 4: Station markers — visible at zoom, code labels at detail zoom
190
-
let show_station_codes = vp_width < 25.0;
238
+
// Layer 6: Station markers — small dots, codes at zoom
239
+
let show_station_codes = vp_width < 20.0;
191
240
for station in &station_dots {
192
241
let (marker, color) = if station.is_selected {
193
242
("◉", Color::Cyan)
194
243
} else {
195
-
("○", Color::Rgb(120, 130, 160))
244
+
("·", Color::Rgb(100, 110, 140))
196
245
};
197
246
ctx.print(
198
247
station.lon,
···
203
252
let label_color = if station.is_selected {
204
253
Color::Cyan
205
254
} else {
206
-
Color::Rgb(90, 95, 110)
255
+
Color::Rgb(80, 85, 100)
207
256
};
208
257
ctx.print(
209
-
station.lon + vp_width * 0.008,
258
+
station.lon + vp_width * 0.006,
210
259
station.lat,
211
260
Span::styled(station.code.clone(), Style::default().fg(label_color)),
212
261
);
213
262
}
214
263
}
215
264
216
-
// Layer 5: Train markers — colored dots, brightness = speed
265
+
// Layer 7: Train markers — circles, color intensity = speed
217
266
for dot in &dots {
267
+
let marker = if dot.is_selected { "◉" } else { "○" };
218
268
ctx.print(
219
269
dot.lon,
220
270
dot.lat,
221
271
Span::styled(
222
-
"•",
272
+
marker,
223
273
Style::default().fg(dot.color).add_modifier(Modifier::BOLD),
224
274
),
225
275
);