[Manifold-l] Exporting to shapefile: Displacement

[Bob Heitzman]

Works fine for Cal State Plane V.

Be sure to assign the proper projection to the TIGER stuff - looks like
plane unprojected but the local scale is 0.001 (I think, a regular import
via Manifold should be the correct scale. DO NOT change the scale in the
assignment dialog after a fresh TIGER import.

I occasionally get tripped up in that I export the TIGER layer as lat/long
SHP files without reprojecting the data first. You must reproject the TIGER
data to set the scales to 1 before exporting to lat/long. The scales=1 is
needed so your layers play well with other non-projected layers. A similar
scale issue could be your problem. The issue has to do with the poor support
for projection metadata for shapefiles.

On 5/4/07, Ivan Santiago <isantiago at ogp.gobierno.pr> wrote:
>
>  Greetings:
>
>
>
> Does anybody's having problems exporting shapefiles using State Plane
> Coord System ?
>
>
>
> It appears that sometimes the coords are multiplied by a factor, placing
> the exported shapefile hundred of miles away from their correct place.
>
>
>
> My workaround is to project back the original (TIGER file) to Lat/Long
> (nad83), export that to shapefile and project the resulting file to SPCS
> NAD83
>
>
>
>
>
> INFO:
>
> Converting TIGER2006SE files from original source (census) to Manifold 7
>
> Project chains drawing to State Plane NAD83 Zone PR & USVI (1) (What's the
> difference betw 1 and 2 anyways?)
>
> Work with chains table, editing tabular data.
>
>
>
> Export to shapefile (sometimes gives huge displacement errors)
>
>
>
> Manifold version: 7.1.16.1079
>
> Intel Pentium Pro /II/III Model 5 Stepping 9
>
> Physical Memory: 512 MB
>
> OS: Win XP (b2600) SP 2
>
> Running 32-bit mode
>
>
>
>
>
> ---------------------------
>
> Iván Santiago
> Information Technologies
> Office of Management and Budget <http://www.ogp.gobierno.pr/>
> 787.977.9200 x 4289
> Calle Cruz 254
> PO Box 9023228
> San Juan, PR 00902-3228
> -66°05'07.25",18°26'54.74"(WGS84)
> « De tous ceux qui n'ont rien à dire, les plus intéréssant sont ceux qui
> se taisent. » - Michel Colucci (Coluche)
> « De todos aquéllos que no tienen nada que decir, los más interesantes son
> los que se abstienen de hablar»
>
>
>
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>
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