[postgis-users] zigGIS Usage Experiences

joshua.uyehara at syngenta.com joshua.uyehara at syngenta.com
Tue Nov 28 10:14:49 PST 2006

Hey Paolo,

Abe isn't working on it anymore, but I have been occasionally plugging
away at it myself.  The problem with adding the layer in ArcMap is due
to a minor bug.

ZigGIS pulls the geometry column data from PostGIS in its native binary
format and passes it to ArcMap.  Unfortunately, PostGIS' internal binary
format is not identical to the expected wkb format, so ArcMap silently
ignores it and basically treats the table as a feature-less object

One quick workaround is to create a view of the table that converts the
geometry column with asbinary(), and then manually add the necessary
entry to the geometry_columns table.


CREATE VIEW geom_table_view AS SELECT asbinary(geom_column) as
geom_column, column2, column3, FROM geom_table;
INSERT INTO geometry_columns (f_table_schema, f_table_name,
f_geometry_column, coord_dimension, srid, type) VALUES
	('public', 'geom_table_view', 'geom_column', 2, -1,

Change schema, table, column names, srid, etc. to match your table, then
specify the view as the table to be opened with ZigGIS.  It's an ugly
kludge, but I haven't had the time to fix the problem in ZigGIS itself

Many of the feature class functionality hasn't been implemented yet, so
you can't do much besides display the features.  I'm planning to add
features to ZigGIS as I need them for work, but I can't give you any
timelines on it, as I'm swamped with other stuff at the moment.

Hope that helped,
Joshua Uyehara
joshua.uyehara at syngenta.com

-----Original Message-----
From: postgis-users-bounces at postgis.refractions.net
[mailto:postgis-users-bounces at postgis.refractions.net] On Behalf Of
Paolo Corti
Sent: Monday, November 27, 2006 6:46 AM
To: postgis-users at postgis.refractions.net
Subject: Re: [postgis-users] zigGIS Usage Experiences

Hello Abe

you made a great job with your ZigGis! The ArcObjects code is amazing!

maybe you can give me a help
I compiled your code for using it with ArcGis 9 (i made some little
modifications at the code to get this) and .NET 2.0 It compiled fine,
but when I start ArcMap and I add a PostGIS layer, it adds the layer on
the TOC but nothing is showed/drawed on the map.
Looks like geometries are not read from the shape column.
I am wondering if you are still on this project, and maybe you could
give me some help, or if I am on my own and must deeply
investigate/debug myself the code in order to find what is not going

best regards
Paolo Corti
GIS Developer

Abe Gillespie wrote:
> Sorry for the cross post, but the zigGIS list only has 9 subscribers 
> with a ton more downloads than that.
> I'm curious about any experiences people are having using or even
> *trying* to use zigGIS.  Is it working?  Anyone need any help?  Any 
> constructive criticism?  ... I haven't heard a peep yet.
> Thanks.
> -Abe
> _______________________________________________
> postgis-users mailing list
> postgis-users at postgis.refractions.net
> http://postgis.refractions.net/mailman/listinfo/postgis-users

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