[mapserver-users] No errors, but no lines on output map.

[Stephen Woodbridge]

Ben,

Do you want shape files for Carroll Co.? It would probably work better
than OGR. What is the tiger file name you are working with for Carrol
county?

Can you handle a big email or would you rather download it froma
website? Assume you want it :)

-Steve W.

Ben Logan wrote:
> 
> On Fri, Apr 05, 2002 at 02:41:23PM -0500, Stephen Woodbridge wrote:
> > Ben,
> >
> > Change your map file to :
> >
> > UNITS DD
> > # extents for all of Virginia
> > EXTENT -83.682000 36.543600 -74.952000 39.769180
> >
> > should fix your problem.
> 
> Thanks, that did at least cause something to show up.  However, I
> wanted to change the layer to represent landmark features, and now
> nothing will show up again (same EXTENT as you gave above).  The
> output of ogrinfo on the Tiger data looks like this:
> 
> INFO: Open of `web/mapserv_demo/test/data/carroll'
> using driver `TIGER' successful.
> 1: CompleteChain (Line String)
> 2: AltName (None)
> 3: FeatureIds (None)
> 4: ZipCodes (None)
> 5: Landmarks (Point)
> 6: AreaLandmarks (None)
> 7: KeyFeatures (None)
> 8: Polygon (None)
> 9: EntityNames (Point)
> 10: IDHistory (None)
> 11: PolyChainLink (None)
> 12: PIP (Point)
> 13: TLIDRange (None)
> 14: ZipPlus4 (None)
> 
> Note:
> When I speak of layers below, I'm talking about the argument to
> CONNECTION in a LAYER definition.  E.g.,
> 
> CONNECTON "data/carroll, 0"
> 
> I have skimmed the Tiger/LINE 2000 spec (from the Census Bureau) and
> have some understanding (perhaps wrong :) of how the different record
> types relate.  Based on that, I thought that I should get a map of the
> roads from layer 1 (CompleteChain).  However, the only way I get any
> output at all is if I use 0.  If I change the layer arg to 5 and the
> LAYER TYPE to POINT, I get nothing and the result is returned very
> quickly unlike what happens when I use 0 which takes quite a few
> seconds.
> 
> I know that it would take a comination of layers to get the names of
> the landmark features (or road names, etc), but it seems like I should
> get a plot of the points.
> 
> Thanks,
> Ben
> 
> --
> Ben Logan: ben at wblogan dot net
> OpenPGP Key KeyID: A1ADD1F0
> 
> Any stone in your boot always migrates against the pressure gradient to
> exactly the point of most pressure.
>                 -- Milt Barber