diff --git a/mapserver/Cargo.lock b/mapserver/Cargo.lock
index e9cbfe1..604000c 100644
--- a/mapserver/Cargo.lock
+++ b/mapserver/Cargo.lock
@@ -337,12 +337,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "bit_field"
-version = "0.10.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dcb6dd1c2376d2e096796e234a70e17e94cc2d5d54ff8ce42b28cef1d0d359a4"
-
 [[package]]
 name = "bitflags"
 version = "1.3.2"
@@ -530,30 +524,6 @@ dependencies = [
  "crossbeam-utils",
 ]
 
-[[package]]
-name = "crossbeam-deque"
-version = "0.8.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6455c0ca19f0d2fbf751b908d5c55c1f5cbc65e03c4225427254b46890bdde1e"
-dependencies = [
- "cfg-if 1.0.0",
- "crossbeam-epoch",
- "crossbeam-utils",
-]
-
-[[package]]
-name = "crossbeam-epoch"
-version = "0.9.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c00d6d2ea26e8b151d99093005cb442fb9a37aeaca582a03ec70946f49ab5ed9"
-dependencies = [
- "cfg-if 1.0.0",
- "crossbeam-utils",
- "lazy_static",
- "memoffset",
- "scopeguard",
-]
-
 [[package]]
 name = "crossbeam-utils"
 version = "0.8.7"
@@ -637,34 +607,12 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "212d0f5754cb6769937f4501cc0e67f4f4483c8d2c3e1e922ee9edbe4ab4c7c0"
 
-[[package]]
-name = "either"
-version = "1.6.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e78d4f1cc4ae33bbfc157ed5d5a5ef3bc29227303d595861deb238fcec4e9457"
-
 [[package]]
 name = "event-listener"
 version = "2.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "77f3309417938f28bf8228fcff79a4a37103981e3e186d2ccd19c74b38f4eb71"
 
-[[package]]
-name = "exr"
-version = "1.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d4badb9489a465cb2c555af1f00f0bfd8cecd6fc12ac11da9d5b40c5dd5f0200"
-dependencies = [
- "bit_field",
- "deflate",
- "flume",
- "half",
- "inflate",
- "lebe",
- "smallvec",
- "threadpool",
-]
-
 [[package]]
 name = "fastrand"
 version = "1.7.0"
@@ -690,31 +638,6 @@ dependencies = [
  "web-sys",
 ]
 
-[[package]]
-name = "flate2"
-version = "1.0.22"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e6988e897c1c9c485f43b47a529cef42fde0547f9d8d41a7062518f1d8fc53f"
-dependencies = [
- "cfg-if 1.0.0",
- "crc32fast",
- "libc",
- "miniz_oxide 0.4.4",
-]
-
-[[package]]
-name = "flume"
-version = "0.10.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b279436a715a9de95dcd26b151db590a71961cc06e54918b24fe0dd5b7d3fc4"
-dependencies = [
- "futures-core",
- "futures-sink",
- "nanorand",
- "pin-project",
- "spin",
-]
-
 [[package]]
 name = "form_urlencoded"
 version = "1.0.1"
@@ -772,12 +695,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "futures-sink"
-version = "0.3.21"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "21163e139fa306126e6eedaf49ecdb4588f939600f0b1e770f4205ee4b7fa868"
-
 [[package]]
 name = "futures-task"
 version = "0.3.21"
@@ -826,10 +743,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "418d37c8b1d42553c93648be529cb70f920d3baf8ef469b74b9638df426e0b4c"
 dependencies = [
  "cfg-if 1.0.0",
- "js-sys",
  "libc",
  "wasi 0.10.0+wasi-snapshot-preview1",
- "wasm-bindgen",
 ]
 
 [[package]]
@@ -842,16 +757,6 @@ dependencies = [
  "polyval",
 ]
 
-[[package]]
-name = "gif"
-version = "0.11.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3a7187e78088aead22ceedeee99779455b23fc231fe13ec443f99bb71694e5b"
-dependencies = [
- "color_quant",
- "weezl",
-]
-
 [[package]]
 name = "gloo-timers"
 version = "0.2.3"
@@ -864,12 +769,6 @@ dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "half"
-version = "1.8.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eabb4a44450da02c90444cf74558da904edde8fb4e9035a9a6a4e15445af0bd7"
-
 [[package]]
 name = "hermit-abi"
 version = "0.1.19"
@@ -970,15 +869,10 @@ dependencies = [
  "bytemuck",
  "byteorder",
  "color_quant",
- "exr",
- "gif",
- "jpeg-decoder 0.2.2",
  "num-iter",
  "num-rational",
  "num-traits",
  "png",
- "scoped_threadpool",
- "tiff",
 ]
 
 [[package]]
@@ -987,15 +881,6 @@ version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "64e9829a50b42bb782c1df523f78d332fe371b10c661e78b7a3c34b0198e9fac"
 
-[[package]]
-name = "inflate"
-version = "0.4.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1cdb29978cc5797bd8dcc8e5bf7de604891df2a8dc576973d71a281e916db2ff"
-dependencies = [
- "adler32",
-]
-
 [[package]]
 name = "instant"
 version = "0.1.12"
@@ -1011,21 +896,6 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1aab8fc367588b89dcee83ab0fd66b72b50b72fa1904d7095045ace2b0c81c35"
 
-[[package]]
-name = "jpeg-decoder"
-version = "0.1.22"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "229d53d58899083193af11e15917b5640cd40b29ff475a1fe4ef725deb02d0f2"
-
-[[package]]
-name = "jpeg-decoder"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "105fb082d64e2100074587f59a74231f771750c664af903f1f9f76c9dedfc6f1"
-dependencies = [
- "rayon",
-]
-
 [[package]]
 name = "js-sys"
 version = "0.3.56"
@@ -1050,12 +920,6 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
-[[package]]
-name = "lebe"
-version = "0.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7efd1d698db0759e6ef11a7cd44407407399a910c774dd804c64c032da7826ff"
-
 [[package]]
 name = "libc"
 version = "0.2.118"
@@ -1108,25 +972,6 @@ version = "2.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "308cc39be01b73d0d18f82a0e7b2a3df85245f84af96fdddc5d202d27e47b86a"
 
-[[package]]
-name = "memoffset"
-version = "0.6.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5aa361d4faea93603064a027415f07bd8e1d5c88c9fbf68bf56a285428fd79ce"
-dependencies = [
- "autocfg",
-]
-
-[[package]]
-name = "miniz_oxide"
-version = "0.4.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a92518e98c078586bc6c934028adcca4c92a53d6a958196de835170a01d84e4b"
-dependencies = [
- "adler",
- "autocfg",
-]
-
 [[package]]
 name = "miniz_oxide"
 version = "0.5.1"
@@ -1136,15 +981,6 @@ dependencies = [
  "adler",
 ]
 
-[[package]]
-name = "nanorand"
-version = "0.6.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "729eb334247daa1803e0a094d0a5c55711b85571179f5ec6e53eccfdf7008958"
-dependencies = [
- "getrandom 0.2.4",
-]
-
 [[package]]
 name = "num-integer"
 version = "0.1.44"
@@ -1290,7 +1126,7 @@ dependencies = [
  "bitflags",
  "crc32fast",
  "deflate",
- "miniz_oxide 0.5.1",
+ "miniz_oxide",
 ]
 
 [[package]]
@@ -1418,31 +1254,6 @@ dependencies = [
  "rand_core 0.5.1",
 ]
 
-[[package]]
-name = "rayon"
-version = "1.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c06aca804d41dbc8ba42dfd964f0d01334eceb64314b9ecf7c5fad5188a06d90"
-dependencies = [
- "autocfg",
- "crossbeam-deque",
- "either",
- "rayon-core",
-]
-
-[[package]]
-name = "rayon-core"
-version = "1.9.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d78120e2c850279833f1dd3582f730c4ab53ed95aeaaaa862a2a5c71b1656d8e"
-dependencies = [
- "crossbeam-channel",
- "crossbeam-deque",
- "crossbeam-utils",
- "lazy_static",
- "num_cpus",
-]
-
 [[package]]
 name = "redox_syscall"
 version = "0.2.10"
@@ -1473,12 +1284,6 @@ version = "1.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "73b4b750c782965c211b42f022f59af1fbceabdd026623714f104152f1ec149f"
 
-[[package]]
-name = "scoped_threadpool"
-version = "0.1.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d51f5df5af43ab3f1360b429fa5e0152ac5ce8c0bd6485cae490332e96846a8"
-
 [[package]]
 name = "scopeguard"
 version = "1.1.0"
@@ -1643,15 +1448,6 @@ dependencies = [
  "winapi",
 ]
 
-[[package]]
-name = "spin"
-version = "0.9.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "511254be0c5bcf062b019a6c89c01a664aa359ded62f78aa72c6fc137c0590e5"
-dependencies = [
- "lock_api",
-]
-
 [[package]]
 name = "standback"
 version = "0.2.17"
@@ -1762,15 +1558,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "threadpool"
-version = "1.8.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d050e60b33d41c19108b32cea32164033a9013fe3b46cbd4457559bfbf77afaa"
-dependencies = [
- "num_cpus",
-]
-
 [[package]]
 name = "tide"
 version = "0.16.0"
@@ -1794,17 +1581,6 @@ dependencies = [
  "serde_json",
 ]
 
-[[package]]
-name = "tiff"
-version = "0.7.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0247608e998cb6ce39dfc8f4a16c50361ce71e5b52e6d24ea1227ea8ea8ee0b2"
-dependencies = [
- "flate2",
- "jpeg-decoder 0.1.22",
- "weezl",
-]
-
 [[package]]
 name = "time"
 version = "0.1.44"
@@ -2032,12 +1808,6 @@ dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "weezl"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d8b77fdfd5a253be4ab714e4ffa3c49caf146b4de743e97510c0656cf90f1e8e"
-
 [[package]]
 name = "wepoll-ffi"
 version = "0.1.2"
diff --git a/mapserver/Cargo.toml b/mapserver/Cargo.toml
index db9016c..a67520e 100644
--- a/mapserver/Cargo.toml
+++ b/mapserver/Cargo.toml
@@ -7,7 +7,7 @@ edition = "2021"
 async-std = { version = "1.6.5", features = ["attributes"] }
 crossbeam-channel = "0.5.2"
 http-types = "2.12.0"
-image = "0.24.1"
+image = { version = "0.24.1", default-features = false, features = ["png"] }
 log = "0.4.14"
 parking_lot = "0.12.0"
 serde = "1.0.117"
diff --git a/mapserver/src/main.rs b/mapserver/src/main.rs
index 0409df6..5ebb478 100644
--- a/mapserver/src/main.rs
+++ b/mapserver/src/main.rs
@@ -172,6 +172,11 @@ fn generate_tile(
 								}
 							}
 
+							std::fs::create_dir_all(tile_dir).map_err(|e| {
+								error!("Generating tile ({},{},{}): {}", z, x, y, e);
+								Error::Io(e)
+							})?;
+
 							image::imageops::resize(
 								&tile,
 								config.tile_size as u32,
@@ -179,7 +184,10 @@ fn generate_tile(
 								image::imageops::Triangle,
 							)
 							.save(tile_path)
-							.map_err(Error::Image)?;
+							.map_err(|e| {
+								error!("Generating tile ({},{},{}): {}", z, x, y, e);
+								Error::Image(e)
+							})?;
 						}
 						std::cmp::Ordering::Greater => Err(Error::Todo)?,
 					}