diff --git a/.idea/runConfigurations/Run_demo__debug_enable_tracing_.xml b/.idea/runConfigurations/Run_headed_demo__debug_enable_tracing_.xml
similarity index 82%
rename from .idea/runConfigurations/Run_demo__debug_enable_tracing_.xml
rename to .idea/runConfigurations/Run_headed_demo__debug_enable_tracing_.xml
index 092e24ec..123999e7 100644
--- a/.idea/runConfigurations/Run_demo__debug_enable_tracing_.xml
+++ b/.idea/runConfigurations/Run_headed_demo__debug_enable_tracing_.xml
@@ -1,6 +1,6 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="Run demo (debug+enable-tracing)" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
-    <option name="command" value="run -p maplibre-demo --features trace" />
+  <configuration default="false" name="Run headed demo (debug+enable-tracing)" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
+    <option name="command" value="run -p maplibre-demo --features trace -- headed" />
     <option name="workingDirectory" value="file://$PROJECT_DIR$" />
     <option name="channel" value="DEFAULT" />
     <option name="requiredFeatures" value="true" />
diff --git a/.idea/runConfigurations/Run_demo__release_enable_tracing_.xml b/.idea/runConfigurations/Run_headed_demo__release_enable_tracing_.xml
similarity index 81%
rename from .idea/runConfigurations/Run_demo__release_enable_tracing_.xml
rename to .idea/runConfigurations/Run_headed_demo__release_enable_tracing_.xml
index e576fa36..fbe68cb5 100644
--- a/.idea/runConfigurations/Run_demo__release_enable_tracing_.xml
+++ b/.idea/runConfigurations/Run_headed_demo__release_enable_tracing_.xml
@@ -1,6 +1,6 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="Run demo (release+enable-tracing)" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
-    <option name="command" value="run -p maplibre-demo --release --features trace" />
+  <configuration default="false" name="Run headed demo (release+enable-tracing)" type="CargoCommandRunConfiguration" factoryName="Cargo Command">
+    <option name="command" value="run -p maplibre-demo --release --features trace -- headed" />
     <option name="workingDirectory" value="file://$PROJECT_DIR$" />
     <option name="channel" value="DEFAULT" />
     <option name="requiredFeatures" value="true" />
diff --git a/maplibre-demo/Cargo.toml b/maplibre-demo/Cargo.toml
index 4f5739be..b5b59d6f 100644
--- a/maplibre-demo/Cargo.toml
+++ b/maplibre-demo/Cargo.toml
@@ -23,3 +23,5 @@ tracing = "0.1.35"
 tracing-subscriber = { version = "0.3.14", optional = true }
 tracing-tracy = { version = "0.8", optional = true }
 tracy-client = { version = "0.12.7", optional = true }
+
+clap = { version = "3.2.12", features = ["derive"] }
diff --git a/maplibre-demo/src/headed.rs b/maplibre-demo/src/headed.rs
new file mode 100644
index 00000000..f0483f41
--- /dev/null
+++ b/maplibre-demo/src/headed.rs
@@ -0,0 +1,16 @@
+use maplibre::{
+    platform::{http_client::ReqwestHttpClient, schedule_method::TokioScheduleMethod},
+    MapBuilder,
+};
+use maplibre_winit::winit::WinitMapWindowConfig;
+
+pub async fn run_headed() {
+    MapBuilder::new()
+        .with_map_window_config(WinitMapWindowConfig::new("maplibre".to_string()))
+        .with_http_client(ReqwestHttpClient::new(None))
+        .with_schedule_method(TokioScheduleMethod::new())
+        .build()
+        .initialize()
+        .await
+        .run()
+}
diff --git a/maplibre-demo/src/headless.rs b/maplibre-demo/src/headless.rs
new file mode 100644
index 00000000..580c4186
--- /dev/null
+++ b/maplibre-demo/src/headless.rs
@@ -0,0 +1,55 @@
+use maplibre::{
+    coords::{LatLon, WorldTileCoords},
+    error::Error,
+    headless::HeadlessMapWindowConfig,
+    platform::{http_client::ReqwestHttpClient, schedule_method::TokioScheduleMethod},
+    render::settings::{RendererSettings, TextureFormat},
+    util::grid::google_mercator,
+    window::WindowSize,
+    MapBuilder,
+};
+use tile_grid::{extent_wgs84_to_merc, Extent, GridIterator};
+
+pub async fn run_headless(tile_size: u32, min: LatLon, max: LatLon) {
+    let mut map = MapBuilder::new()
+        .with_map_window_config(HeadlessMapWindowConfig {
+            size: WindowSize::new(tile_size, tile_size).unwrap(),
+        })
+        .with_http_client(ReqwestHttpClient::new(None))
+        .with_schedule_method(TokioScheduleMethod::new())
+        .with_renderer_settings(RendererSettings {
+            texture_format: TextureFormat::Rgba8UnormSrgb,
+            ..RendererSettings::default()
+        })
+        .build()
+        .initialize_headless()
+        .await;
+
+    let tile_limits = google_mercator().tile_limits(
+        extent_wgs84_to_merc(&Extent {
+            minx: min.longitude,
+            miny: min.latitude,
+            maxx: max.longitude,
+            maxy: max.latitude,
+        }),
+        0,
+    );
+
+    for (z, x, y) in GridIterator::new(10, 10, tile_limits) {
+        let coords = WorldTileCoords::from((x as i32, y as i32, z.into()));
+        println!("Rendering {}", &coords);
+        map.map_schedule
+            .fetch_process(&coords)
+            .await
+            .expect("Failed to fetch and process!");
+
+        match map.map_schedule_mut().update_and_redraw() {
+            Ok(_) => {}
+            Err(Error::Render(e)) => {
+                eprintln!("{}", e);
+                if e.should_exit() {}
+            }
+            e => eprintln!("{:?}", e),
+        };
+    }
+}
diff --git a/maplibre-demo/src/main.rs b/maplibre-demo/src/main.rs
index a128b511..f32c5a3e 100644
--- a/maplibre-demo/src/main.rs
+++ b/maplibre-demo/src/main.rs
@@ -1,31 +1,12 @@
-use std::collections::HashSet;
+use std::io::ErrorKind;
 
-use maplibre::{
-    benchmarking::tessellation::{IndexDataType, OverAlignedVertexBuffer},
-    coords::{TileCoords, ViewRegion, WorldTileCoords, ZoomLevel},
-    error::Error,
-    headless::{utils::HeadlessPipelineProcessor, HeadlessMapWindowConfig},
-    io::{
-        pipeline::{PipelineContext, PipelineProcessor, Processable},
-        source_client::{HttpClient, HttpSourceClient},
-        tile_pipelines::build_vector_tile_pipeline,
-        tile_repository::StoredLayer,
-        RawLayer, TileRequest,
-    },
-    platform::{
-        http_client::ReqwestHttpClient, run_multithreaded, schedule_method::TokioScheduleMethod,
-    },
-    render::{
-        settings::{RendererSettings, TextureFormat},
-        ShaderVertex,
-    },
-    style::source::TileAddressingScheme,
-    util::{grid::google_mercator, math::Aabb2},
-    window::{EventLoop, WindowSize},
-    MapBuilder,
-};
-use maplibre_winit::winit::WinitMapWindowConfig;
-use tile_grid::{extent_wgs84_to_merc, Extent, GridIterator};
+use clap::{builder::ValueParser, Parser, Subcommand};
+use maplibre::{coords::LatLon, platform::run_multithreaded};
+
+use crate::{headed::run_headed, headless::run_headless};
+
+mod headed;
+mod headless;
 
 #[cfg(feature = "trace")]
 fn enable_tracing() {
@@ -36,63 +17,46 @@ fn enable_tracing() {
     tracing::subscriber::set_global_default(subscriber).expect("setting default subscriber failed");
 }
 
-fn run_in_window() {
-    run_multithreaded(async {
-        MapBuilder::new()
-            .with_map_window_config(WinitMapWindowConfig::new("maplibre".to_string()))
-            .with_http_client(ReqwestHttpClient::new(None))
-            .with_schedule_method(TokioScheduleMethod::new())
-            .build()
-            .initialize()
-            .await
-            .run()
-    })
+#[derive(Parser)]
+#[clap(author, version, about, long_about = None)]
+#[clap(propagate_version = true)]
+struct Cli {
+    #[clap(subcommand)]
+    command: Commands,
 }
 
-fn run_headless() {
-    run_multithreaded(async {
-        let mut map = MapBuilder::new()
-            .with_map_window_config(HeadlessMapWindowConfig {
-                size: WindowSize::new(1000, 1000).unwrap(),
-            })
-            .with_http_client(ReqwestHttpClient::new(None))
-            .with_schedule_method(TokioScheduleMethod::new())
-            .with_renderer_settings(RendererSettings {
-                texture_format: TextureFormat::Rgba8UnormSrgb,
-                ..RendererSettings::default()
-            })
-            .build()
-            .initialize_headless()
-            .await;
+fn parse_lat_long(env: &str) -> Result<LatLon, std::io::Error> {
+    let split = env.split(',').collect::<Vec<_>>();
+    if let (Some(latitude), Some(longitude)) = (split.get(0), split.get(1)) {
+        Ok(LatLon::new(
+            latitude.parse::<f64>().unwrap(),
+            longitude.parse::<f64>().unwrap(),
+        ))
+    } else {
+        Err(std::io::Error::new(
+            ErrorKind::InvalidData,
+            "Failed to parse latitude and longitude.",
+        ))
+    }
+}
 
-        let tile_limits = google_mercator().tile_limits(
-            extent_wgs84_to_merc(&Extent {
-                minx: 11.3475219363,
-                miny: 48.0345697188,
-                maxx: 11.7917815798,
-                maxy: 48.255861,
-            }),
-            0,
-        );
-
-        for (z, x, y) in GridIterator::new(10, 10, tile_limits) {
-            let coords = WorldTileCoords::from((x as i32, y as i32, z.into()));
-            println!("Rendering {}", &coords);
-            map.map_schedule
-                .fetch_process(&coords)
-                .await
-                .expect("Failed to fetch and process!");
-
-            match map.map_schedule_mut().update_and_redraw() {
-                Ok(_) => {}
-                Err(Error::Render(e)) => {
-                    eprintln!("{}", e);
-                    if e.should_exit() {}
-                }
-                e => eprintln!("{:?}", e),
-            };
-        }
-    })
+#[derive(Subcommand)]
+enum Commands {
+    Headed {},
+    Headless {
+        #[clap(default_value_t = 400)]
+        tile_size: u32,
+        #[clap(
+            value_parser = ValueParser::new(parse_lat_long),
+            default_value_t = LatLon::new(48.0345697188, 11.3475219363)
+        )]
+        min: LatLon,
+        #[clap(
+            value_parser = ValueParser::new(parse_lat_long),
+            default_value_t = LatLon::new(48.255861, 11.7917815798)
+        )]
+        max: LatLon,
+    },
 }
 
 fn main() {
@@ -101,6 +65,20 @@ fn main() {
     #[cfg(feature = "trace")]
     enable_tracing();
 
-    //run_headless();
-    run_in_window();
+    let cli = Cli::parse();
+
+    // You can check for the existence of subcommands, and if found use their
+    // matches just as you would the top level cmd
+    match &cli.command {
+        Commands::Headed {} => {
+            run_multithreaded(async { run_headed().await });
+        }
+        Commands::Headless {
+            tile_size,
+            min,
+            max,
+        } => {
+            run_multithreaded(async { run_headless(*tile_size, *min, *max).await });
+        }
+    }
 }
diff --git a/maplibre/src/context.rs b/maplibre/src/context.rs
index f8a57f74..5f99755d 100644
--- a/maplibre/src/context.rs
+++ b/maplibre/src/context.rs
@@ -20,15 +20,14 @@ pub struct ViewState {
 impl ViewState {
     pub fn new<P: Into<cgmath::Rad<f64>>>(
         window_size: &WindowSize,
+        position: WorldCoords,
         zoom: Zoom,
-        center: LatLon,
         pitch: f64,
         fovy: P,
     ) -> Self {
         let tile_center = TILE_SIZE / 2.0;
         let fovy = fovy.into();
         let height = tile_center / (fovy / 2.0).tan();
-        let position = WorldCoords::from_lat_lon(center, zoom);
 
         let camera = Camera::new(
             (position.x, position.y, height),
diff --git a/maplibre/src/coords.rs b/maplibre/src/coords.rs
index cabfc4ee..55d196a3 100644
--- a/maplibre/src/coords.rs
+++ b/maplibre/src/coords.rs
@@ -1,6 +1,10 @@
 //! Provides utilities related to coordinates.
 
-use std::{f64::consts::PI, fmt};
+use std::{
+    f64::consts::PI,
+    fmt,
+    fmt::{Display, Formatter},
+};
 
 use cgmath::{num_traits::Pow, AbsDiffEq, Matrix4, Point3, Vector3};
 
@@ -112,17 +116,32 @@ impl Into<u8> for ZoomLevel {
 }
 
 #[derive(Copy, Clone, Debug)]
-pub struct LatLon(f64, f64);
+pub struct LatLon {
+    pub latitude: f64,
+    pub longitude: f64,
+}
 
 impl LatLon {
     pub fn new(latitude: f64, longitude: f64) -> Self {
-        LatLon(latitude, longitude)
+        LatLon {
+            latitude,
+            longitude,
+        }
     }
 }
 
 impl Default for LatLon {
     fn default() -> Self {
-        LatLon(0.0, 0.0)
+        LatLon {
+            latitude: 0.0,
+            longitude: 0.0,
+        }
+    }
+}
+
+impl Display for LatLon {
+    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+        write!(f, "{},{}", self.latitude, self.longitude)
     }
 }
 
@@ -477,10 +496,10 @@ impl WorldCoords {
     pub fn from_lat_lon(lat_lon: LatLon, zoom: Zoom) -> WorldCoords {
         let tile_size = TILE_SIZE * 2.0_f64.powf(zoom.0);
         // Get x value
-        let x = (lat_lon.1 + 180.0) * (tile_size / 360.0);
+        let x = (lat_lon.longitude + 180.0) * (tile_size / 360.0);
 
         // Convert from degrees to radians
-        let lat_rad = (lat_lon.0 * PI) / 180.0;
+        let lat_rad = (lat_lon.latitude * PI) / 180.0;
 
         // get y value
         let merc_n = f64::ln(f64::tan((PI / 4.0) + (lat_rad / 2.0)));
diff --git a/maplibre/src/headless.rs b/maplibre/src/headless.rs
index 6a359518..20913c51 100644
--- a/maplibre/src/headless.rs
+++ b/maplibre/src/headless.rs
@@ -13,7 +13,7 @@ use wgpu::{BufferAsyncError, BufferSlice};
 
 use crate::{
     context::{MapContext, ViewState},
-    coords::{LatLon, ViewRegion, WorldTileCoords, Zoom},
+    coords::{LatLon, ViewRegion, WorldCoords, WorldTileCoords, Zoom, TILE_SIZE},
     error::Error,
     headless::utils::HeadlessPipelineProcessor,
     io::{
@@ -114,12 +114,9 @@ where
     ) -> Self {
         let view_state = ViewState::new(
             &window_size,
-            style.zoom.map(|zoom| Zoom::new(zoom)).unwrap_or_default(),
-            style
-                .center
-                .map(|center| LatLon::new(center[0], center[1]))
-                .unwrap_or_default(),
-            style.pitch.unwrap_or_default(),
+            WorldCoords::from((TILE_SIZE / 2., TILE_SIZE / 2.)),
+            Zoom::default(),
+            0.0,
             cgmath::Deg(110.0),
         );
         let tile_repository = TileRepository::new();
@@ -210,6 +207,8 @@ where
             pool.clear();
         }
 
+        self.map_context.tile_repository.clear();
+
         while let Some(layer) = processor.layers.pop() {
             self.map_context
                 .tile_repository
diff --git a/maplibre/src/io/tile_repository.rs b/maplibre/src/io/tile_repository.rs
index e8197b26..96066247 100644
--- a/maplibre/src/io/tile_repository.rs
+++ b/maplibre/src/io/tile_repository.rs
@@ -67,6 +67,10 @@ impl TileRepository {
         }
     }
 
+    pub fn clear(&mut self) {
+        self.tree.clear();
+    }
+
     /// Inserts a tessellated layer into the quad tree at its world tile coords.
     /// If the space is vacant, the tessellated layer is inserted into a new
     /// [crate::io::tile_repository::CachedTile].
diff --git a/maplibre/src/map_schedule.rs b/maplibre/src/map_schedule.rs
index 16462a2e..7f98b0b8 100644
--- a/maplibre/src/map_schedule.rs
+++ b/maplibre/src/map_schedule.rs
@@ -2,7 +2,7 @@ use std::{marker::PhantomData, mem};
 
 use crate::{
     context::{MapContext, ViewState},
-    coords::{LatLon, Zoom},
+    coords::{LatLon, WorldCoords, Zoom, TILE_SIZE},
     error::Error,
     io::{
         scheduler::Scheduler,
@@ -52,16 +52,14 @@ where
         wgpu_settings: WgpuSettings,
         renderer_settings: RendererSettings,
     ) -> Self {
-        let view_state = ViewState::new(
-            &window_size,
-            style.zoom.map(|zoom| Zoom::new(zoom)).unwrap_or_default(),
-            style
-                .center
-                .map(|center| LatLon::new(center[0], center[1]))
-                .unwrap_or_default(),
-            style.pitch.unwrap_or_default(),
-            cgmath::Deg(110.0),
-        );
+        let zoom = style.zoom.map(|zoom| Zoom::new(zoom)).unwrap_or_default();
+        let position = style
+            .center
+            .map(|center| WorldCoords::from_lat_lon(LatLon::new(center[0], center[1]), zoom))
+            .unwrap_or_default();
+        let pitch = style.pitch.unwrap_or_default();
+        let view_state = ViewState::new(&window_size, position, zoom, pitch, cgmath::Deg(110.0));
+
         let tile_repository = TileRepository::new();
         let mut schedule = Schedule::default();
 
diff --git a/maplibre/src/style/style.rs b/maplibre/src/style/style.rs
index 0a10d5f7..b8d890a5 100644
--- a/maplibre/src/style/style.rs
+++ b/maplibre/src/style/style.rs
@@ -18,7 +18,7 @@ pub struct Style {
     pub metadata: HashMap<String, String>,
     pub sources: HashMap<String, Source>,
     pub layers: Vec<StyleLayer>,
-    pub center: Option<[f64; 2]>,
+    pub center: Option<[f64; 2]>, // TODO: Use LatLon type here
     pub zoom: Option<f64>,
     pub pitch: Option<f64>,
 }