NGA DNC Support?

[Frank Warmerdam]

On 1/12/06, Stephane Lessard <LESSARDST at dfo-mpo.gc.ca> wrote:
> Hello list,
>
> Are there any plans to support Nautical Geospatial-Intelligence Agency's
> (NGA) Digital Nautical Chart (DNC) products in MapServer? Does anybody use
> those products? The format itself is called Vector Product Format (VPF).
>
> http://www.nga.mil/portal/site/dnc/index.jsp?front_door=true
> <http://www.nga.mil/portal/site/dnc/index.jsp?front_door=true>

Stéphane,

I have successfully used some DNC products through OGR
using the OGDI bridge.  OGDI includes a general VPF driver.
If you want to experiment a bit with this, the FWTools builds
include OGDI support.

The tricky part is getting the right datasource name, and
layer name.   For my tests I used the following DNC datasource
name:

  gltp:/vrf/home/warmerda/dnc13/h1316010

The gltp:/vrf/ part tells the system that the OGDI (gltp
protocol) bridge should be used, and through that bridge
the OGDI VRF (VPF) driver is used.

When I use ogrinfo I get the following list of layers:

[guest at gdal2200 guest]$ ogrinfo -ro gltp:/vrf/home/warmerda/dnc13/h1316010
INFO: Open of `gltp:/vrf/home/warmerda/dnc13/h1316010'
using driver `OGDI' successful.
1: buildnga at cul(*)_area (Polygon)
2: industa at cul(*)_area (Polygon)
3: landmrka at cul(*)_area (Polygon)
4: transa at cul(*)_area (Polygon)
5: fencel at cul(*)_line (Line String)
6: railrdl at cul(*)_line (Line String)
7: transl at cul(*)_line (Line String)
8: buildngp at cul(*)_point (Point)
9: commp at cul(*)_point (Point)
10: industp at cul(*)_point (Point)
11: landmrkp at cul(*)_point (Point)
12: ecrarea at ecr(*)_area (Polygon)
13: foreshoa at ecr(*)_area (Polygon)
14: adminl at ecr(*)_line (Line String)
15: coastl at ecr(*)_line (Line String)
16: foreshol at ecr(*)_line (Line String)
17: islandp at ecr(*)_point (Point)
18: ecrtext at ecr(*)_text (Point)
19: tidep at env(*)_point (Point)
20: hydarea at hyd(*)_area (Polygon)
21: hydline at hyd(*)_line (Line String)
22: botcharp at hyd(*)_point (Point)
23: soundp at hyd(*)_point (Point)
24: canala at iwy(*)_area (Polygon)
25: lakea at iwy(*)_area (Polygon)
26: misciwya at iwy(*)_area (Polygon)
27: rivera at iwy(*)_area (Polygon)
28: canall at iwy(*)_line (Line String)
29: riverl at iwy(*)_line (Line String)
30: embanka at lcr(*)_area (Polygon)
31: lcrline at lcr(*)_line (Line String)
32: limbndya at lim(*)_area (Polygon)
33: limbndya at lim(*)_area (Polygon)
34: maritima at lim(*)_area (Polygon)
35: maritima at lim(*)_area (Polygon)
36: distl at lim(*)_line (Line String)
37: distl at lim(*)_line (Line String)
38: limbndyl at lim(*)_line (Line String)
39: limbndyl at lim(*)_line (Line String)
40: maritiml at lim(*)_line (Line String)
41: maritiml at lim(*)_line (Line String)
42: routel at lim(*)_line (Line String)
43: routel at lim(*)_line (Line String)
44: limbndyp at lim(*)_point (Point)
45: leadingl at nav(*)_line (Line String)
46: buoybcnp at nav(*)_point (Point)
47: lightsp at nav(*)_point (Point)
48: markerp at nav(*)_point (Point)
49: bridgea at obs(*)_area (Polygon)
50: dangera at obs(*)_area (Polygon)
51: hazarda at obs(*)_area (Polygon)
52: obstruca at obs(*)_area (Polygon)
53: reefa at obs(*)_area (Polygon)
54: ruinsa at obs(*)_area (Polygon)
55: bridgel at obs(*)_line (Line String)
56: hazardl at obs(*)_line (Line String)
57: pipelinl at obs(*)_line (Line String)
58: dangerp at obs(*)_point (Point)
59: hazardp at obs(*)_point (Point)
60: loadingp at obs(*)_point (Point)
61: obstrucp at obs(*)_point (Point)
62: ruinsp at obs(*)_point (Point)
63: piera at por(*)_area (Polygon)
64: structra at por(*)_area (Polygon)
65: pierl at por(*)_line (Line String)
66: seawalll at por(*)_line (Line String)
67: structrl at por(*)_line (Line String)
68: berthp at por(*)_point (Point)
69: mooringp at por(*)_point (Point)
70: relline at rel(*)_line (Line String)
71: dqyarea at dqy(*)_area (Polygon)
72: tileref at tileref(*)_area (Polygon)
73: libref at libref(*)_line (Line String)

The layer names are pretty funky, but it should work.

Best regards,
--
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent