diff --git a/ports/pdal-dimbuilder/portfile.cmake b/ports/pdal-dimbuilder/portfile.cmake
index 72c027c63a..5ad58166ae 100644
--- a/ports/pdal-dimbuilder/portfile.cmake
+++ b/ports/pdal-dimbuilder/portfile.cmake
@@ -9,7 +9,7 @@ vcpkg_from_github(
     #[[
         Attention: pdal must be updated together with pdal-dimbuilder
     #]]
-    SHA512 16350288122aae0c6f59bf91d1ee631b85e9653d76b706d27427706484fefbbe5f7fa3bc3ec1f1fda0fd37fb6cb0388d3ed712db614c22aff5dcd66b4998ff1e
+    SHA512 85aaab726d172ef46b8cf05bd72772da72cf5615db549cd262acc4d468f631f1093577b9866ca598b7bef72507f7774e599e66a6cbbf589bd1b5b85bb8107642
     HEAD_REF master
     PATCHES
         namespace-nl.diff
diff --git a/ports/pdal-dimbuilder/vcpkg.json b/ports/pdal-dimbuilder/vcpkg.json
index a1abafac01..26059b985d 100644
--- a/ports/pdal-dimbuilder/vcpkg.json
+++ b/ports/pdal-dimbuilder/vcpkg.json
@@ -1,6 +1,6 @@
 {
   "name": "pdal-dimbuilder",
-  "version": "2.8.4",
+  "version": "2.9.0",
   "description": "A tool used by the PDAL build process",
   "homepage": "https://pdal.io/",
   "license": "BSD-3-Clause",
diff --git a/ports/pdal/dependencies.diff b/ports/pdal/dependencies.diff
index d166d313ea..00837415b4 100644
--- a/ports/pdal/dependencies.diff
+++ b/ports/pdal/dependencies.diff
@@ -12,9 +12,9 @@ index dc65543..5bccbce 100644
 -add_subdirectory(vendor/utfcpp)
  add_subdirectory(vendor/lepcc)
 -add_subdirectory(vendor/h3)
+ add_subdirectory(vendor/spz)
  add_subdirectory(tools)
  add_subdirectory(apps)
- 
 @@ -220,12 +217,13 @@ add_library(PDAL::PDAL ALIAS ${PDAL_LIB_NAME})
  
  
@@ -38,14 +38,15 @@ index dc65543..5bccbce 100644
 +find_package(nanoflann CONFIG REQUIRED)
 +target_link_libraries(${PDAL_LIB_NAME} PRIVATE nanoflann::nanoflann)
  
- #
- # Allow downstream cmake projects to find PDAL header files without
-@@ -274,7 +274,7 @@ target_include_directories(${PDAL_LIB_NAME}
+ if (ZSTD_FOUND)
+     target_link_libraries(${PDAL_LIB_NAME}
+@@ -307,9 +307,6 @@ target_include_directories(${PDAL_LIB_NAME}
+     INTERFACE
+         $<INSTALL_INTERFACE:include>)
  
- target_compile_definitions(${PDAL_LIB_NAME}
-     PRIVATE
+-target_compile_definitions(${PDAL_LIB_NAME}
+-    PRIVATE
 -    H3_PREFIX=PDALH3)
-+)
  
  if(WIN32)
      target_compile_definitions(${PDAL_LIB_NAME}
@@ -63,20 +64,6 @@ index 5f68579..a407c60 100644
  set_package_properties(GDAL PROPERTIES TYPE REQUIRED
      PURPOSE "Provides general purpose raster, vector, and reference system support")
  if (GDAL_FOUND)
-diff --git a/cmake/geotiff.cmake b/cmake/geotiff.cmake
-index 1d1e8af..f713c05 100644
---- a/cmake/geotiff.cmake
-+++ b/cmake/geotiff.cmake
-@@ -2,7 +2,8 @@
- # GeoTIFF support
- #
- 
--find_package(GeoTIFF REQUIRED 1.3.0)
-+find_package(GeoTIFF CONFIG REQUIRED)
-+set(GEOTIFF_LIBRARY ${GEOTIFF_LIBRARIES})
- set_package_properties(GeoTIFF PROPERTIES TYPE REQUIRED)
- if (GEOTIFF_FOUND)
-     include_directories("${GEOTIFF_INCLUDE_DIR}")
 diff --git a/cmake/h3.cmake b/cmake/h3.cmake
 index 398ad6d..fb3c9ad 100644
 --- a/cmake/h3.cmake
@@ -114,37 +101,6 @@ index 6543ff6..dc6fac8 100644
 +set(UTFCPP_INCLUDE_DIR "")
  set(UTFCPP_LIB_NAME utf8::cpp)
  
-diff --git a/cmake/zstd.cmake b/cmake/zstd.cmake
-index dfe3dc0..9f699e6 100644
---- a/cmake/zstd.cmake
-+++ b/cmake/zstd.cmake
-@@ -4,7 +4,10 @@
- option(WITH_ZSTD
-     "Build support for compression/decompression with Zstd." TRUE)
- if (WITH_ZSTD)
--    find_package(ZSTD QUIET)
-+    find_package(ZSTD NAMES zstd REQUIRED)
-+    set(ZSTD_INCLUDE_DIRS "")
-+    set(ZSTD_LIBRARIES zstd::libzstd)
-+    set(ZSTD_STATIC_LIB zstd::libzstd)
-     set_package_properties(ZSTD PROPERTIES TYPE
-         PURPOSE "General compression support")
-     if (ZSTD_FOUND)
-diff --git a/filters/H3Filter.cpp b/filters/H3Filter.cpp
-index 6eb10a2..153c3ee 100644
---- a/filters/H3Filter.cpp
-+++ b/filters/H3Filter.cpp
-@@ -45,7 +45,9 @@
- #include <string>
- #include <vector>
- 
--#include <h3api.h>
-+#include <h3/h3api.h>
-+#define PDALH3degsToRads    degsToRads
-+#define PDALH3latLngToCell  latLngToCell
- 
- namespace pdal
- {
 diff --git a/pdal/JsonFwd.hpp b/pdal/JsonFwd.hpp
 index f764961..f64dcc6 100644
 --- a/pdal/JsonFwd.hpp
@@ -205,5 +161,5 @@ index b15d595..a452d14 100644
  target_link_libraries(lasdump PRIVATE
 +    ${UTFCPP_LIB_NAME}
      ${PDAL_LAZPERF_LIB_NAME}
+     ${GDAL_LIBRARY}
  )
- target_include_directories(lasdump PRIVATE
diff --git a/ports/pdal/h3api.h b/ports/pdal/h3api.h
new file mode 100644
index 0000000000..41aac33c52
--- /dev/null
+++ b/ports/pdal/h3api.h
@@ -0,0 +1,8 @@
+#include <h3/h3api.h>
+#define PDALH3degsToRads                degsToRads
+#define PDALH3radsToDegs                radsToDegs
+#define PDALH3latLngToCell              latLngToCell
+#define PDALH3localIjToCell             localIjToCell
+#define PDALH3cellToLocalIj             cellToLocalIj
+#define PDALH3cellsToDirectedEdge       cellsToDirectedEdge
+#define PDALH3directedEdgeToBoundary    directedEdgeToBoundary
diff --git a/ports/pdal/portfile.cmake b/ports/pdal/portfile.cmake
index 723f427e00..dcf198f5ae 100644
--- a/ports/pdal/portfile.cmake
+++ b/ports/pdal/portfile.cmake
@@ -1,24 +1,5 @@
 vcpkg_check_linkage(ONLY_DYNAMIC_LIBRARY)
 
-vcpkg_download_distfile(
-    gdal_3_11_diff
-    URLS "https://github.com/PDAL/PDAL/commit/0f6469d6a64b20a5554f8cfa9792361c3c055fcf.diff?full_index=1"
-    FILENAME "PDAL-PDAL-2.8.4-gdal-3.11-0f6469d.diff"
-    SHA512 e0aecd9e56d041b81c0c5ddd7a6a0f9b323cdcc806fdc44507fc8ee2001c605fe20a1b3b7502dd02905ec55f85fdabd7bfd29a6eac865e55c224b3ff263cd4f6
-)
-vcpkg_download_distfile(
-    gdal_3_11_diff_2
-    URLS "https://github.com/PDAL/PDAL/commit/6eab0d87c9bd550d59c08fa4496872f63ac62062.diff?full_index=1"
-    FILENAME "PDAL-PDAL-2.8.4-gdal-3.11-6eab0d8.diff"
-    SHA512 dea919c69f2c9d4b5a60d9fc969d6f0dc7b0ad3876a4599286987272af75ddf5d3f77a5d273208e4106c456cf7810ebdece2810d121d1f3e5d9adaa0416dd7b8
-)
-vcpkg_download_distfile(
-    gdal_3_11_diff_3
-    URLS "https://github.com/PDAL/PDAL/commit/cca07c0254cff367ce6c12bfc18b9cdb2331c700.diff?full_index=1"
-    FILENAME "PDAL-PDAL-2.8.4-gdal-3.11-cca07c0.diff"
-    SHA512 e20608fb6a117c35a01a541eb63af4ab11d9df7b508836c622d17c97938707b8d09553cc3bb53d3986a42fcaf5c7774315215bcb6063272d9bcb9b54267d5a6a
-)
-
 vcpkg_from_github(
     OUT_SOURCE_PATH SOURCE_PATH
     REPO PDAL/PDAL
@@ -26,20 +7,17 @@ vcpkg_from_github(
     #[[
         Attention: pdal-dimbuilder must be updated together with pdal
     #]]
-    SHA512 16350288122aae0c6f59bf91d1ee631b85e9653d76b706d27427706484fefbbe5f7fa3bc3ec1f1fda0fd37fb6cb0388d3ed712db614c22aff5dcd66b4998ff1e
+    SHA512 85aaab726d172ef46b8cf05bd72772da72cf5615db549cd262acc4d468f631f1093577b9866ca598b7bef72507f7774e599e66a6cbbf589bd1b5b85bb8107642
     HEAD_REF master
     PATCHES
         dependencies.diff
         external-dimbuilder.diff
         find-library-suffix.diff
         no-rpath.patch
-        "${gdal_3_11_diff}"
-        "${gdal_3_11_diff_2}"
-        "${gdal_3_11_diff_3}"
-        gdal-3.11.diff # backport of https://github.com/PDAL/PDAL/commit/e840f5901010c513395c9f7f13e4001260e187d4
+        spz-zlib.diff  # https://github.com/PDAL/PDAL/issues/4745
 )
 file(REMOVE_RECURSE
-    "${SOURCE_PATH}/cmake/modules/FindCURL.cmake"
+    "${SOURCE_PATH}/cmake/modules/FindCurl.cmake"
     "${SOURCE_PATH}/cmake/modules/FindGeoTIFF.cmake"
     "${SOURCE_PATH}/cmake/modules/FindICONV.cmake"
     "${SOURCE_PATH}/cmake/modules/FindZSTD.cmake"
@@ -50,6 +28,8 @@ file(REMOVE_RECURSE
     "${SOURCE_PATH}/vendor/schema-validator"
     "${SOURCE_PATH}/vendor/utfcpp"
 )
+# PDAL includes "h3api.h", and some calls are decorated with PDALH3
+file(COPY "${CURRENT_PORT_DIR}/h3api.h" DESTINATION "${SOURCE_PATH}")
 # PDAL uses namespace 'NL' for nlohmann
 file(COPY "${CURRENT_INSTALLED_DIR}/include/nlohmann" DESTINATION "${SOURCE_PATH}/vendor/nlohmann/")
 file(APPEND "${SOURCE_PATH}/vendor/nlohmann/nlohmann/json.hpp" "\nnamespace NL = nlohmann;\n")
@@ -127,10 +107,14 @@ file(READ "${SOURCE_PATH}/vendor/lepcc/src/LEPCC.h" license)
 string(REGEX REPLACE "^/\\*\n|\\*/.*\$" "" license "${license}")
 file(WRITE "${lepcc_license}" "${license}")
 
+set(spz_license "${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-rel/spz LICENSE")
+file(COPY_FILE "${SOURCE_PATH}/vendor/spz/LICENSE" "${spz_license}")
+
 vcpkg_install_copyright(FILE_LIST
     "${SOURCE_PATH}/LICENSE.txt"
     "${arbiter_license}"
     "${kazhdan_license}"
     "${lazperf_license}"
     "${lepcc_license}"
+    "${spz_license}"
 )
diff --git a/ports/pdal/spz-zlib.diff b/ports/pdal/spz-zlib.diff
new file mode 100644
index 0000000000..b57c6e7c5e
--- /dev/null
+++ b/ports/pdal/spz-zlib.diff
@@ -0,0 +1,11 @@
+diff --git a/vendor/spz/CMakeLists.txt b/vendor/spz/CMakeLists.txt
+index 7377269..b866bb7 100644
+--- a/vendor/spz/CMakeLists.txt
++++ b/vendor/spz/CMakeLists.txt
+@@ -10,5 +10,6 @@ file(GLOB SPZ_SRCS
+ PDAL_ADD_FREE_LIBRARY(${PDAL_SPZ_LIB_NAME} STATIC ${SPZ_SRCS})
+ 
+ set_target_properties(${PDAL_SPZ_LIB_NAME} PROPERTIES POSITION_INDEPENDENT_CODE ON)
++target_link_libraries(${PDAL_SPZ_LIB_NAME} PRIVATE ZLIB::ZLIB)
+ 
+ set_property(GLOBAL PROPERTY _PDAL_SPZ_INCLUDED TRUE)
diff --git a/ports/pdal/vcpkg.json b/ports/pdal/vcpkg.json
index 72038738b8..b0ba6474d6 100644
--- a/ports/pdal/vcpkg.json
+++ b/ports/pdal/vcpkg.json
@@ -1,7 +1,6 @@
 {
   "name": "pdal",
-  "version": "2.8.4",
-  "port-version": 1,
+  "version": "2.9.0",
   "description": "PDAL - Point Data Abstraction Library is a library for manipulating point cloud data.",
   "homepage": "https://pdal.io/",
   "license": null,
diff --git a/versions/baseline.json b/versions/baseline.json
index faa9371fb1..2e87a174d0 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -7205,15 +7205,15 @@
       "port-version": 0
     },
     "pdal": {
-      "baseline": "2.8.4",
-      "port-version": 1
+      "baseline": "2.9.0",
+      "port-version": 0
     },
     "pdal-c": {
       "baseline": "2.2.0",
       "port-version": 0
     },
     "pdal-dimbuilder": {
-      "baseline": "2.8.4",
+      "baseline": "2.9.0",
       "port-version": 0
     },
     "pdcurses": {
diff --git a/versions/p-/pdal-dimbuilder.json b/versions/p-/pdal-dimbuilder.json
index 28ccb72d50..6049021640 100644
--- a/versions/p-/pdal-dimbuilder.json
+++ b/versions/p-/pdal-dimbuilder.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "38afc2f2b79098fc88f3280e5a2a3d650fd0774e",
+      "version": "2.9.0",
+      "port-version": 0
+    },
     {
       "git-tree": "247fd325eb4de5174b888fd43fa6bc546e61f11c",
       "version": "2.8.4",
diff --git a/versions/p-/pdal.json b/versions/p-/pdal.json
index 91219a5f8e..8e8c21774a 100644
--- a/versions/p-/pdal.json
+++ b/versions/p-/pdal.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "cb2dc06ee5a21456cd9107eb556222b65d4cea88",
+      "version": "2.9.0",
+      "port-version": 0
+    },
     {
       "git-tree": "4156020f50513b9521f932fbe60f5f81967b0148",
       "version": "2.8.4",