[Imports] NHD data skipped by nhd2osm
Dylan Semler
dylan.semler at gmail.com
Tue Jun 22 20:36:07 BST 2010
I've patched the nhd2osm scripts to print details about the NHD
tag conversions[1]. I'm attaching the output of the scripts with my patch
applied if anyone is interested in what it does.
When running against my test subbasin, it shows me that a few tags were
skipped:
FType FCode
BayInlet 31200
Reservoir 43624
Waterfall 48700
I'm wondering what the best way to handle these three is.
BayInlet:
In my data sample, the BayInlet ways are mostly identical (with many
duplicate nodes) to the bay portion the lake that they're in. If a straight
tag-conversion is done, then there would be two mostly identical-overlapping
ways, which may not be _too_ bad of a result. However, the ideal solution
is probably for the bay way to be identical to the relevant portion of the
lake way. This would require manually creating each bay. What have other
people done?
Reservoir:
The script maps most features to osm tags based on their FType. However,
Reservoirs need to be mapped based on their FCode. It looks like the 43624
FCode might have been added to the NHD data after the script was made.
There are a few other new Reservoir FCodes as well. According to the FCode
changes document[2] 43624 corresponds to "Reservoir Type|treatment".
Perhaps this one should be tagged as water_works[3]?
Waterfall:
I'm not sure why the script doesn't convert Waterfalls. The
wiki recommends waterway=waterfall[4]. Maybe it was accidentally omitted?
[1]http://trac.openstreetmap.org/ticket/3014
[2]http://nhd.usgs.gov/fcode_changes.pdf
[3]http://wiki.openstreetmap.org/wiki/Tag:man_made%3Dwater_works
<http://wiki.openstreetmap.org/wiki/Tag:man_made%3Dwater_works>[4]
http://wiki.openstreetmap.org/wiki/NHD
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[Dylan at PCI-DSEMLER-0 hydrography]$ ../../nhd2osm/polyshp2osm-Area.py -S NHDArea.shp
Running 1 slices with poly_output base filename against shapefile NHDArea.shp
------------------------- Fields without osm mapping --------------------------
Mapped shp Field(s) OSM tag(s) Unmapped shp Field(s) Count
(none) (none) BayInlet; 31200 19
------------------------- Fields with osm mapping --------------------------
Mapped shp Field(s) OSM tag(s) Unmapped shp Field(s) Count
Rapids waterway: rapids 43100 16
whitewater: rapid
StreamRiver waterway: riverbank 46006 58
DamWeir waterway: dam 34306 1
[Dylan at PCI-DSEMLER-0 hydrography]$ ../../nhd2osm/polyshp2osm-WaterBody.py -S NHDWaterbody.shp
Running 1 slices with poly_output base filename against shapefile NHDWaterbody.shp
Splitting file with 27459 objs
Splitting file with 29221 objs
------------------------- Fields without osm mapping --------------------------
Mapped shp Field(s) OSM tag(s) Unmapped shp Field(s) Count
(none) (none) Reservoir; 43624 3
------------------------- Fields with osm mapping --------------------------
Mapped shp Field(s) OSM tag(s) Unmapped shp Field(s) Count
43612 landuse: reservoir Reservoir 3
43610 landuse: reservoir Reservoir 1
LakePond natural: water 39004 511
43601 landuse: reservoir Reservoir 2
LakePond natural: water 39009 110
[Dylan at PCI-DSEMLER-0 hydrography]$ ../../nhd2osm/shape_to_osm-Line.py NHDLine.shp
parsing shpfile
compiling nodelist
compiling waylist
constructing osm xml file
writing NHDLine.osm1.osm
------------------------- Fields without osm mapping --------------------------
Mapped shp Field(s) OSM tag(s) Unmapped shp Field(s) Count
(none) (none) 48700; Waterfall 2
------------------------- Ignored fields --------------------------
Mapped shp Field(s) OSM tag(s) Unmapped shp Field(s) Count
(none) (none) Nonearthen Shore; 41100 43
------------------------- Fields with osm mapping --------------------------
Mapped shp Field(s) OSM tag(s) Unmapped shp Field(s) Count
DamWeir waterway: stream 34306 2
[Dylan at PCI-DSEMLER-0 hydrography]$ ../../nhd2osm/shape_to_osm-Flowline.py NHDFlowline.shp
parsing shpfile
compiling nodelist
compiling waylist
constructing osm xml file
writing NHDFlowline.1.osm
writing NHDFlowline.2.osm
writing NHDFlowline.3.osm
writing NHDFlowline.4.osm
------------------------- Ignored fields --------------------------
Mapped shp Field(s) OSM tag(s) Unmapped shp Field(s) Count
(none) (none) Connector; 33400 120
------------------------- Fields with osm mapping --------------------------
Mapped shp Field(s) OSM tag(s) Unmapped shp Field(s) Count
StreamRiver waterway: stream 46006 803
Pipeline man_made: pipeline 42803 2
type: water
StreamRiver waterway: stream 46003 287
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