[gdal-dev] Missing layers with GeoPDF to MVT conversion with ogr2ogr/gdal 2.3.0

[Max Ogden]

Hi, I am trying to convert USFS FSTopo GeoPDFs into Mapbox Vector Tiles
like this:

$ wget
https://data.fs.usda.gov/geodata/rastergateway/data/34117/fstopo/340711752_Azusa_FSTopo.pdf
$ ogr2ogr -f MBTILES test.mbtiles 340711752_Azusa_FSTopo.pdf

I'm using gdal git master (GDAL 2.4.0dev-1f6d597, released 2018/06/28) with
poppler 0.64.0.

My issue is that when I view the mbtiles in a webgl map (using $
tileserver-gl-light test.mbtiles) I only see 13 layers, not the 59 I was
expecting. Is it possible to include the vector information in all the
GeoPDF metadata layers when converting to MVT? I tried adding `--config
OGR_PDF_READ_NON_STRUCTURED YES` to the end of my ogr2ogr command but it
had no effect.

ogrinfo shows 59 metadata layers and 13 top level named layers:

```

$ ogrinfo -mdd layers 340711752_Azusa_FSTopo.pdf

INFO: Open of `340711752_Azusa_FSTopo.pdf'

      using driver `PDF' successful.

Metadata:

  CREATION_DATE=D:20171221174439Z

  CREATOR=Esri ArcSOC 10.3.1.4959

  NEATLINE=POLYGON ((407183.394216688 3775784.59268212,407183.480495386
3790905.61434883,420034.534067471 3790905.80204647,420034.842839467
3775784.26947838,407183.394216688 3775784.59268212))

Metadata (layers):

  LAYER_00_NAME=Other_5

  LAYER_01_NAME=Quadrangle_Extent

  LAYER_02_NAME=Quadrangle_Extent.Labels

  LAYER_03_NAME=Quadrangle_Extent.Labels.State_Outline_-_Default

  LAYER_04_NAME=Quadrangle_Extent.Other_4

  LAYER_05_NAME=Quadrangle_Extent.State_Outline

  LAYER_06_NAME=Adjacent_Quadrangle_Diagram

  LAYER_07_NAME=Adjacent_Quadrangle_Diagram.Other_3

  LAYER_08_NAME=Adjacent_Quadrangle_Diagram.Labels

  LAYER_09_NAME=Adjacent_Quadrangle_Diagram.Labels.Quad_Outlines_-_Default

  LAYER_10_NAME=Adjacent_Quadrangle_Diagram.Quadrangle_Extent

  LAYER_11_NAME=Adjacent_Quadrangle_Diagram.Quad_Outlines

  LAYER_12_NAME=Other_2

  LAYER_13_NAME=Quadrangle

  LAYER_14_NAME=Quadrangle.Other

  LAYER_15_NAME=Quadrangle.Labels

  LAYER_16_NAME=Quadrangle.Labels.Unplaced_Labels

  LAYER_17_NAME=Quadrangle.Labels.Unplaced_Labels.Road_Shields_-_Vertical

  LAYER_18_NAME=Quadrangle.Labels.Road_Shields_-_Horizontal

  LAYER_19_NAME=Quadrangle.Labels.Road_Shields_-_Vertical

  LAYER_20_NAME=Quadrangle.Labels.Road_Shields_-_Default

  LAYER_21_NAME=Quadrangle.Neatline/Mask

  LAYER_22_NAME=Quadrangle.Neatline/Mask.Grid_Labels

  LAYER_23_NAME=Quadrangle.Neatline/Mask.Neatline

  LAYER_24_NAME=Quadrangle.Neatline/Mask.Mask

  LAYER_25_NAME=Quadrangle.Text

  LAYER_26_NAME=Quadrangle.Road_Shields

  LAYER_27_NAME=Quadrangle.Buildings

  LAYER_28_NAME=Quadrangle.Culture_Features

  LAYER_29_NAME=Quadrangle.Drainage_Features

  LAYER_30_NAME=Quadrangle.Large_Tanks

  LAYER_31_NAME=Quadrangle.Survey_Points

  LAYER_32_NAME=Quadrangle.Geodetic_Control

  LAYER_33_NAME=Quadrangle.Recreation/Facility_Features

  LAYER_34_NAME=Quadrangle.Transportation_Features

  LAYER_35_NAME=Quadrangle.Linear_Transportation_Features

  LAYER_36_NAME=Quadrangle.Railroads_

  LAYER_37_NAME=Quadrangle.Linear_Culture_Features

  LAYER_38_NAME=Quadrangle.Linear_Landform_Features

  LAYER_39_NAME=Quadrangle.Boundaries

  LAYER_40_NAME=Quadrangle.Boundaries

  LAYER_41_NAME=Quadrangle.PLSS

  LAYER_42_NAME=Quadrangle.Survey_Lines

  LAYER_43_NAME=Quadrangle.Linear_Drainage_Features

  LAYER_44_NAME=Quadrangle.Contour_Labels

  LAYER_45_NAME=Quadrangle.Contours

  LAYER_46_NAME=Quadrangle.2_5`_Tics

  LAYER_47_NAME=Quadrangle.2_5`_Tics.Interior_Grid_Intersections

  LAYER_48_NAME=Quadrangle.2_5`_Tics.Grid_Tics_along_Neatline

  LAYER_49_NAME=Quadrangle.UTM_Grid

  LAYER_50_NAME=Quadrangle.UTM_Grid.Interior_Grid_Intersections

  LAYER_51_NAME=Quadrangle.UTM_Grid.Grid_Tics_along_Neatline

  LAYER_52_NAME=Quadrangle.UTM_Grid.UTM_Grid_Lines

  LAYER_53_NAME=Quadrangle.Large_Buildings

  LAYER_54_NAME=Quadrangle.Culture_Features

  LAYER_55_NAME=Quadrangle.Landforms

  LAYER_56_NAME=Quadrangle.Drainage_Polygons

  LAYER_57_NAME=Quadrangle.Ownership

  LAYER_58_NAME=Quadrangle.Builtup_Areas

  LAYER_59_NAME=Quadrangle.WoodlandUSGS_P

1: Quadrangle_Culture_Features

2: Quadrangle_Contour_Labels

3: Quadrangle_Contours

4: Quadrangle_2_5`_Tics_Interior_Grid_Intersections

5: Quadrangle_2_5`_Tics_Grid_Tics_along_Neatline

6: Quadrangle_UTM_Grid_Interior_Grid_Intersections

7: Quadrangle_UTM_Grid_Grid_Tics_along_Neatline

8: Quadrangle_UTM_Grid_UTM_Grid_Lines

9: Quadrangle_Large_Buildings

10: Quadrangle_Drainage_Polygons

11: Quadrangle_Ownership

12: Quadrangle_Builtup_Areas

13: Quadrangle_WoodlandUSGS_P
```

Thank you,
Max
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