[postgis-users] RE: zigGIS Usage Experiences

Tue Nov 28 11:01:34 PST 2006

Yes Abe
I have seen your 3ed at support.esri.com
no one seemed to help you
I am sorry

Have you checked out these 3 alternatives at ArcObjects help (under
extending arcobjects)?
1) Custom Layers
2) Plug in data sources
3) OGIS compliant OLE DB providers

Plug in is not applicable (it is read only), but the other 2 are viable
Custom Layers also from .NET
I was investigating if also OGIS OLE DB could be developed in .NET (in the
Help is written only VC++ realistic for implementation, but maybe this
comment is obsolete now)

in any case,
congratulations for your great job, even if ZigGis do not write ;-)

Paolo

Abe Gillespie wrote:
> 
> Sorry, zigGIS does not write.  That, of course, is the "Holy Grail" of
> these efforts.
> 
> -Abe
> 
> On 11/28/06, Paolo Corti <pcorti at gmail.com> wrote:
>>
>> Hello Joshua
>> and thanks for the workaround, I will test it as ASAP
>> It is very possibly that we could join to make some modification at
>> ZigGis,
>> as far as I would like in my spare time to write a connector for PostGis
>> for
>> ArcMap.
>> First I was looking at PgArc (I also migrated that at ArcObjects 9), but
>> I
>> think the best approach is like ZigGis does, without a proxy shapefile,
>> but
>> directly reading the data.
>> I have one more question, before going on.
>> In this mailing list it was claimed, I think just from Abe, that ZigGis
>> can
>> read and also WRITE PostGis data. Is this correct? Because from what you
>> are
>> writing seems that ZigGis can just read and not write, and maybe I could
>> be
>> not interested in continuing using ZigGis.
>> In fact I have decided to write in my spare time a full Read/Write
>> PostGis
>> connector for ArcMap. But before doing that I would like to deeply
>> investigate if ZigGis already does the job.
>>
>> Best regards
>> Paolo Corti
>> http://www.paolocorti.net
>>
>>
>> joshua.uyehara wrote:
>> >
>> > 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
>> > class.
>> >
>> > 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.
>> >
>> > E.g.,
>> >
>> > 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,
>> > 'MULTIPOLYGON');
>> >
>> > 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
>> > yet.
>> >
>> > 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
>> > properly
>> >
>> > best regards
>> > Paolo Corti
>> > GIS Developer
>> > http://www.paolocorti.net
>> >
>> >
>> > 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
>> >> _______________________________________________
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>> >>
>> >>
>> >
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