[Shapelib] RE: Problem using shapelib

[David A Allen]

Brian

It is in ArcView - click on the file (in ArcCatalog I think it was) to
get the popup menu and it is in there somewhere. I do not have access to
Arcview currently so cannot advise further other than to suggest that it
may have had something to do with the process of creating a layer for
the shapefile. If you find it, it could however give you a file you can
compare to see what works and what does not. Realistically, what format
of shapefiles Arcview accepts defines what is acceptable regardless of
what the shapefile format document says.

_______________________
David Allen - Research PhD Candidate specializing in
electrical conductivity imaging of groundwater.
National Centre for Groundwater Management
University of Technology - Sydney
Email       David.A1 at bigpond.com
mobile      0418 964 097
phone/fax +61 2 63323895 (ring before sending any fax)
70 Morrisset St Bathurst NSW 2795 Australia.


-----Original Message-----
From: shapelib-bounces at lists.maptools.org
[mailto:shapelib-bounces at lists.maptools.org] On Behalf Of Brian Peschel
Sent: Friday, 18 June 2004 2:33 AM
To: shapelib at lists.maptools.org
Subject: [Shapelib] RE: Problem using shapelib


Is this function in ArcView?  Or is it some external program?  Any ideas

if this is a problem in ArcView or in ShapeLib?

Brian

>
>Date: Thu, 17 Jun 2004 10:22:09 +1000
>From: "David A Allen" <David.A1 at bigpond.com>
>Subject: RE: [Shapelib] Problem using shapelib
>To: "'Shapelib Development'" <shapelib at lists.maptools.org>
>Message-ID: <000801c45401$21b30f60$0aa736cb at David>
>Content-Type: text/plain;	charset="us-ascii"
>
>Brian
>
>I have encountered this type of problem in ArcView and found that there

>is a function there that can remake a shapefile from a shapefile - this

>rectified the problem I had but is hardly a production solution.
>
>Regard David Allen
>
>_______________________
>David Allen - Research PhD Candidate specializing in electrical 
>conductivity imaging of groundwater. National Centre for Groundwater 
>Management University of Technology - Sydney
>Email       David.A1 at bigpond.com
>mobile      0418 964 097
>phone/fax +61 2 63323895 (ring before sending any fax)
>70 Morrisset St Bathurst NSW 2795 Australia.
>
>
>-----Original Message-----
>From: shapelib-bounces at lists.maptools.org
>[mailto:shapelib-bounces at lists.maptools.org] On Behalf Of Brian Peschel
>Sent: Tuesday, 15 June 2004 1:46 AM
>To: shapelib at lists.maptools.org
>Subject: [Shapelib] Problem using shapelib
>
>
>I am having problems with ArcView and shapefiles I am creating with
>shapelib (linux RH 8.0)
>
>I am creating the shape files
>    shpHandle = SHPCreate(tname.c_str(), SHPT_POLYGON);
>
>and then adding the points
>    SHPGetInfo(shpHandle, NULL, &shapeType, NULL, NULL);
>    panParts[0] = 1;
>    // Loop and add each point
>        padfX[verticesCount] = convertedPoint.x();
>        padfY[verticesCount] = convertedPoint.y();
>        verticesCount++;
>    // end loop
>    psObject = SHPCreateObject(shapeType, -1, 1, panParts, NULL,
>verticesCount, padfX, padfY, NULL, NULL );
>
>I then add the first point again since it is a polygon the first and
>last point apparently need to be the same (I have also tried not 
>rewritting the final point). 
>        padfX[verticesCount] = padfX[0];
>        padfY[verticesCount] = padfY[0];
>        verticesCount++;
>
>This is a single ring polygon.  If I call SHPRewindObject it reorders 
>my
>
>points and the first/last point are no longer the same (so I am not
>calling it).  I then write and destroy the objects.
>
>    psObject = SHPCreateObject(shapeType, -1, 1, panParts, NULL,
>verticesCount, padfX, padfY, NULL, NULL );
>    SHPWriteObject(shpHandle, -1, psObject);
>    SHPDestroyObject(psObject);
>
>If I load these files into ArcView, they appear to be okay until you 
>use
>
>them when the last point gets dropped off.  If you use this 
>shapechecker
>
>(http://www.geocities.com/SiliconValley/Haven/2295/useful.html scroll
>down to 'Shapefile Checker' - first hit in google 
>http://www.google.com/search?hl=en&ie=UTF-8&q=shapefile+checker&btnG=Go
o
>gle+Search
>) in debug mode you can see it is confused about the last point (and
>complains about the record size).
>
>I am really lost at this point.  Any thoughts would be helpful.  Thanks
>in advance.
>Brian
>  
>
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