diff --git a/experiments/2024-12-09/Cargo.lock b/experiments/2024-12-09/Cargo.lock
index 8d0ee89cc..490beec6a 100644
--- a/experiments/2024-12-09/Cargo.lock
+++ b/experiments/2024-12-09/Cargo.lock
@@ -85,6 +85,15 @@ version = "1.0.96"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6b964d184e89d9b6b67dd2715bc8e74cf3107fb2b529990c90cf517326150bf4"
 
+[[package]]
+name = "approx"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cab112f0a86d568ea0e627cc1d6be74a1e9cd55214684db5561995f6dad897c6"
+dependencies = [
+ "num-traits",
+]
+
 [[package]]
 name = "arbitrary"
 version = "1.4.1"
@@ -204,6 +213,12 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "byteorder"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
+
 [[package]]
 name = "bytes"
 version = "1.10.0"
@@ -502,6 +517,7 @@ version = "0.0.0"
 dependencies = [
  "anyhow",
  "bytemuck",
+ "geo",
  "glam",
  "glyphon",
  "iter_fixed",
@@ -523,6 +539,12 @@ dependencies = [
  "miniz_oxide",
 ]
 
+[[package]]
+name = "float_next_after"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8bf7cc16383c4b8d58b9905a8509f02926ce3058053c056376248d958c9df1e8"
+
 [[package]]
 name = "foldhash"
 version = "0.1.4"
@@ -588,6 +610,43 @@ version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "aa9a19cbb55df58761df49b23516a86d432839add4af60fc256da840f66ed35b"
 
+[[package]]
+name = "geo"
+version = "0.29.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34f0e6e028c581e82e6822a68869514e94c25e7f8ea669a2d8595bdf7461ccc5"
+dependencies = [
+ "float_next_after",
+ "geo-types",
+ "geographiclib-rs",
+ "i_overlay",
+ "log",
+ "num-traits",
+ "robust",
+ "rstar",
+]
+
+[[package]]
+name = "geo-types"
+version = "0.7.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3bd1157f0f936bf0cd68dec91e8f7c311afe60295574d62b70d4861a1bfdf2d9"
+dependencies = [
+ "approx",
+ "num-traits",
+ "rstar",
+ "serde",
+]
+
+[[package]]
+name = "geographiclib-rs"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6e5ed84f8089c70234b0a8e0aedb6dc733671612ddc0d37c6066052f9781960"
+dependencies = [
+ "libm",
+]
+
 [[package]]
 name = "gethostname"
 version = "0.4.3"
@@ -714,6 +773,15 @@ dependencies = [
  "bitflags 2.8.0",
 ]
 
+[[package]]
+name = "hash32"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "47d60b12902ba28e2730cd37e95b8c9223af2808df9e902d4df49588d1470606"
+dependencies = [
+ "byteorder",
+]
+
 [[package]]
 name = "hashbrown"
 version = "0.14.5"
@@ -733,6 +801,16 @@ dependencies = [
  "foldhash",
 ]
 
+[[package]]
+name = "heapless"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0bfb9eb618601c89945a70e254898da93b13be0388091d42117462b265bb3fad"
+dependencies = [
+ "hash32",
+ "stable_deref_trait",
+]
+
 [[package]]
 name = "heck"
 version = "0.5.0"
@@ -751,6 +829,49 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dfa686283ad6dd069f105e5ab091b04c62850d3e4cf5d67debad1933f55023df"
 
+[[package]]
+name = "i_float"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "775f9961a8d2f879725da8aff789bb20a3ddf297473e0c90af75e69313919490"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "i_key_sort"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "347c253b4748a1a28baf94c9ce133b6b166f08573157e05afe718812bc599fcd"
+
+[[package]]
+name = "i_overlay"
+version = "1.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "01882ce5ed786bf6e8f5167f171a4026cd129ce17d9ff5cbf1e6749b98628ece"
+dependencies = [
+ "i_float",
+ "i_key_sort",
+ "i_shape",
+ "i_tree",
+]
+
+[[package]]
+name = "i_shape"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "27dbe9e5238d6b9c694c08415bf00fb370b089949bd818ab01f41f8927b8774c"
+dependencies = [
+ "i_float",
+ "serde",
+]
+
+[[package]]
+name = "i_tree"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "155181bc97d770181cf9477da51218a19ee92a8e5be642e796661aee2b601139"
+
 [[package]]
 name = "indexmap"
 version = "2.7.1"
@@ -1023,6 +1144,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
 dependencies = [
  "autocfg",
+ "libm",
 ]
 
 [[package]]
@@ -1512,6 +1634,17 @@ version = "0.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6c20b6793b5c2fa6553b250154b78d6d0db37e72700ae35fad9387a46f487c97"
 
+[[package]]
+name = "rstar"
+version = "0.12.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "421400d13ccfd26dfa5858199c30a5d76f9c54e0dba7575273025b43c5175dbb"
+dependencies = [
+ "heapless",
+ "num-traits",
+ "smallvec",
+]
+
 [[package]]
 name = "rustc-hash"
 version = "1.1.0"
@@ -1721,6 +1854,12 @@ dependencies = [
  "bitflags 2.8.0",
 ]
 
+[[package]]
+name = "stable_deref_trait"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8f112729512f8e442d81f95a8a7ddf2b7c6b8a1a6f509a95864142b30cab2d3"
+
 [[package]]
 name = "static_assertions"
 version = "1.1.0"
diff --git a/experiments/2024-12-09/Cargo.toml b/experiments/2024-12-09/Cargo.toml
index e30bba5a1..bb544eb6d 100644
--- a/experiments/2024-12-09/Cargo.toml
+++ b/experiments/2024-12-09/Cargo.toml
@@ -19,6 +19,10 @@ winit = "*"
 version = "*"
 features = ["derive"]
 
+[dependencies.geo]
+version = "*"
+default-features = false
+
 [dependencies.glam]
 version = "*"
 features = ["bytemuck"]