gdal-geopdf

GeoPDFs

This project shows how to process GeoPDFs from the USGS and USFS.

US Topo from US Geologic Survey

US Topo of Wizard Island at Crater Lake National Park

Process Examples

gdalinfo

Inspecting the response from gdalinfo with the option -mdd yields some interesting metadata.

# get Geospatial PDF of Crater Lake West
# Metadata from nationalmap.gov 
  # USGS US Topo 7.5-minute map for Crater Lake West, OR 2017
  # Published Date:  2017-03-23
  # Format:  GeoPDF (27.87 MB), Extent:  7.5 x 7.5 minute

# Make a temp directory and save as a temp file name
mkdir -p tmp
wget -O tmp/test.pdf https://prd-tnm.s3.amazonaws.com/StagedProducts/Maps/USTopo/PDF/OR/OR_Crater_Lake_West_20170323_TM_geo.pdf

gdalinfo -mdd LAYERS tmp/test.pdf

# output
  LAYER_00_NAME=Map_Collar
  LAYER_01_NAME=Map_Collar.Map_Elements
  LAYER_02_NAME=Map_Frame
  LAYER_03_NAME=Map_Frame.Projection_and_Grids
  LAYER_04_NAME=Map_Frame.Geographic_Names
  LAYER_05_NAME=Map_Frame.Structures
  LAYER_06_NAME=Map_Frame.Transportation

  LAYER_12_NAME=Map_Frame.PLSS
  LAYER_13_NAME=Map_Frame.Wetlands
  LAYER_14_NAME=Map_Frame.Hydrography
  LAYER_15_NAME=Map_Frame.Terrain
  LAYER_16_NAME=Map_Frame.Terrain.Contours
  LAYER_17_NAME=Map_Frame.Terrain.Shaded_Relief
  LAYER_18_NAME=Map_Frame.Woodland
  LAYER_19_NAME=Map_Frame.Boundaries

  LAYER_29_NAME=Images
  LAYER_30_NAME=Images.Orthoimage
  LAYER_31_NAME=Barcode
PDF Dimensions
Driver: PDF/Geospatial PDF
Files: tmp/test.pdf
Size is 3412, 4350

22.75 × 29 inches

gdal_translate

DPI=150
gdal_translate tmp/test.pdf tmp/test.$DPI.tif \
  -co COMPRESS=LZW \
  --config GDAL_PDF_DPI $DPI

# Extract
gdalwarp tmp/test.$DPI.tif tmp/test.$DPI.wizard-island.tif \
  -t_srs EPSG:4326 -dstalpha \
  -co COMPRESS=LZW \
  -te -122.17833 42.92361 -122.13799 42.95766


gdal_translate tmp/test.pdf tmp/test.$DPI.Shaded_Relief.tif \
  -co COMPRESS=LZW \
    --config GDAL_PDF_LAYERS "Map_Collar.Map_Elements,Map_Frame.Terrain.Shaded_Relief" \
  --config GDAL_PDF_DPI $DPI

gdalwarp tmp/test.$DPI.Shaded_Relief.tif tmp/test.$DPI.Shaded_Relief.wizard-island.tif \
  -co COMPRESS=LZW \
  -t_srs EPSG:4326 -dstalpha \
  -te -122.17833 42.92361 -122.13799 42.95766

Background

The term “US Topo” refers specifically to quadrangle topographic maps published in 2009 and later. source

Excerpt from October 2017

In 2017, the US Topo map production system was redesigned and modernized to provide a system that facilitates long term goals for more efficient production and continued product improvements. The new system produces maps in a format that uses a different georeferencing mechanism compliant with ISO 32000. The new products can continue to be viewed and printed with Adobe Reader or any comparable PDF viewing software. source

FSTopo from US Forest Service

Wizard Island at Crater Lake National Park

Process Examples

gdalinfo

# get GeoPDF of Crater Lake West
wget https://data.fs.usda.gov/geodata/rastergateway/data/42122/fstopo/425212207_Crater_Lake_West_FSTopo.pdf

gdalinfo -mdd LAYERS 425212207_Crater_Lake_West_FSTopo.pdf

Comments attempting to document the significant layers. Some sublayers removed; run gdalinfo for the full details.

Metadata (LAYERS):
  LAYER_00_NAME=Other_5   # Declination, scale and legend
  LAYER_01_NAME=Quadrangle_Extent

  LAYER_06_NAME=Adjacent_Quadrangle_Diagram

  LAYER_12_NAME=Other_2  # Quad label
  LAYER_13_NAME=Quadrangle
  LAYER_14_NAME=Quadrangle.Other
  LAYER_15_NAME=Quadrangle.Labels

  LAYER_17_NAME=Quadrangle.Neatline/Mask

  LAYER_21_NAME=Quadrangle.Text
  LAYER_22_NAME=Quadrangle.Road_Shields
  LAYER_23_NAME=Quadrangle.Buildings
  LAYER_24_NAME=Quadrangle.Culture_Features
  LAYER_25_NAME=Quadrangle.Drainage_Features
  LAYER_26_NAME=Quadrangle.Spot_Elevations
  LAYER_27_NAME=Quadrangle.Geodetic_Control
  LAYER_28_NAME=Quadrangle.Recreation/Facility_Features
  LAYER_29_NAME=Quadrangle.Linear_Transportation_Features
  LAYER_30_NAME=Quadrangle.Linear_Culture_Features
  LAYER_31_NAME=Quadrangle.PLSS
  LAYER_32_NAME=Quadrangle.Linear_Drainage_Features
  LAYER_33_NAME=Quadrangle.Contour_Labels
  LAYER_34_NAME=Quadrangle.Contours

  LAYER_38_NAME=Quadrangle.UTM_Grid

  LAYER_42_NAME=Quadrangle.Large_Buildings
  LAYER_43_NAME=Quadrangle.Drainage_Polygons
  LAYER_44_NAME=Quadrangle.WoodlandUSGS_P

gdal_translate

DPI=300

gdal_translate 425212207_Crater_Lake_West_FSTopo.pdf 425212207_Crater_Lake_West_FSTopo.$DPI.tif \
  -co COMPRESS=LZW \
  --config GDAL_PDF_DPI $DPI

gdalwarp 425212207_Crater_Lake_West_FSTopo.$DPI.tif 425212207_Crater_Lake_West_FSTopo.$DPI.wizard-island.tif \
  -co COMPRESS=LZW \
  -t_srs EPSG:4326 -dstalpha \
  -te -122.17833 42.92361 -122.13799 42.95766

Background

FSTopo is the Forest Service Primary Base Map Series (1:24,000 scale for the lower 48 and Puerto Rico, 1:63,360 for Alaska) quadrangle maps. FSTopo products cover the US Forest Service lands.

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