Ver no manual o seguinte para verificar como funciona uma geodatabase no
Manifold:

Import Drawing - Geodatabase
Drawings may be imported or linked from ESRI geodatabase files. Geodatabase
files save object metric information within database tables using binary
data types. Manifold recognizes such data as the Manifold Geometry (SHP)
type and can construct dynamic, linked drawings from geodatabases.

Suppose we have an ESRI geodatabase file in .mdb format. We can create a
drawing from this geodatabase by choosing File - Import - Drawing and
choosing .mdb in the Files of type box to open the .mdb file.

In the Import MDB File dialog we choose Geometry (SHP) in the Type box and
press OK. The result is an imported drawing. We could have also used File -
Link - Drawing to link a drawing from the geodatabase if preferred.

Geometry in Tables
Manifold can store geometry in tables. Geometry is the information that
defines objects in drawings, such as points, lines and areas. The metric of
an object is the geometric data that defines that object. In regular
drawings in Manifold, the geometry of objects is stored within the drawing
and the data attributes are stored in the drawing's table. It is also
possible to take the geometric information for each object and save it into
a special geometry column in a table. Tables storing geometry can be tables
within a Manifold project or they can be tables in some external database
system such as a SQL Server database.

Using Geometry Data in Tables

Why store geometry within database tables? Doing so allows use of dynamic
drawings that are dynamically created from tables or queries containing
geometric data. Because of the great flexibility of SQL the ability to
create dynamic drawings from tables or queries makes it possible to create
drawings on demand to suite a wide variety of purposes that cannot be
fulfilled by static drawings.

Besides the obvious benefit of creating dynamic drawings on the fly as
desired, there are many practical gains from storing geometry data in
tables. To name just a few examples:

§ We can store metric data in geometry columns in order to centralize
all data within a database, perhaps a central DBMS using SQL Server.

§ We can store metric data in geometry columns to have more than one
metric for a drawing object. For example, we could associate one object with
another object without using any intermediate columns such as IDs, thus
avoiding any risks of broken associations. Or perhaps we might want to store
different versions of an object's metric for different projections or for
different users.

§ We can use geometry values to store temporary results of geometric
computations within queries.

§ We can edit the Geom (I) intrinsic field in tables associated with
drawings to edit the objects in the drawing.

Geometry Types in Tables

Tables can contain geometric data columns that may use the following data
types:

§ The Geometry type is specific to Manifold System and contains the
object type, the object metric and the coordinate system. This is often
abbreviated to Geom in casual conversation.

§ The Geometry (SHP) is an ESRI-style "geodatabase" binary data type
used by ESRI "geodatabase" capable and other compatible products to store
data in database files. This data type captures object metrics similar to
those used in shapefiles but in database binary form. The name of this type
is often abbreviated to GeomSHP or simply SHP or geodatabase in casual
conversation. This data type allows importing or linking drawings from ESRI
geodatabases.

§ The Geometry (WKB) type is the "well-known binary" data type used by
OpenGIS and similar standards and contains the object type and the metric.
The name of this type is often abbreviated to GeomWKB or simply WKB in
casual conversation. This data type allows importing or linking drawings
from OpenGIS WKB databases.

The above data types are implemented within database tables that can store
binary data. In addition to tables within Manifold System, many modern
database systems, such as SQL Server, Oracle and Access can store data in
this form. Manifold can work with external tables in an external DBMS
provider and save in Geometry, GeomSHP or GeomWKB form.

Geometry (SHP) and Geometry (WKB) data are treated by projection-aware
algorithms assuming the data are in Latitude / Longitude.

Tables opened within Manifold that contain geom data will report Geometry
(WKB) data as <geom wkb, type> and Geometry (SHP) data as <geom shp, type>.

When database tables containing columns of the above geometry types are
saved from Manifold to an external DBMS provider, unless that external DBMS
provider is accessed from another application that understands GeomSHP,
GeomWKB or Manifold's Geometry type the data in such columns will appear as
generic binary data. When accessed by Manifold, the binary data in such
tables can be used as geometry columns to create dynamic drawings. If the
geometry data is in WKB form, any application that understands WKB will be
able to use it.

Geodatabase format is not at present well supported by GIS industry products
nor is Manifold's implementation intended to encourage interchange in this
format. Although Manifold can read ESRI geodatabase information in GeomSHP
it is not likely that database tables written by Manifold that contain
GeomSHP will be usable by ESRI applications as geodatabases because such
geodatabases require additional information within the files in addition to
the GeomSHP binary data.

Cumprimentos














>From: "Cheryl Sharpe" <cmsharpe@...>
>Reply-To: manifold-gis@...
>To: manifold-gis@...
>Subject: [manifold-gis] Re: geodatabase en manifold
>Date: Thu, 20 Oct 2005 19:35:57 -0000
>
>Carlos,
>
>Lo siento. Tienes razón. El "map" es como "mxd" en ESRI. Quizás
>puedes encontrar lo que buscas aquí:
>
>http://69.17.46.170/manifold/manuals/manifold/manifold.htm
>
>Haz clic en Table, entonces en Relations. No es el mismo, pero es una
>cosa similar. El texto es en inglés, pero si puedes leerlo, creo que
>es lo que quieres. Si no, es posible que yo pudiera traducirlo
>(advertencia: como puedes ver, el español no es mi lengua materna).
>
>No sé nada de topology en Manifold.
>
>Buena suerte,
>Cheryl, EEUU
>
>
>--- En manifold-gis@..., carlos gordon <cagb78@y...>
>escribió:
> > Saludos Cheryl, muchas gracias por contestar, pense que ya nadie se
>acordaría... bueno si tienes razón en que el map tiene cierta
>funcionalidad para guardar los drawing, pero no para establecer las
>relaciones (utilizar claves primarias y foraneas, como en una base de
>datos)...ya vi que los drawing de manifold se pueden exportar a
>dynamic drawing (geometría en tablas), pero no veo como se podrían
>definir los 'features' que incluyan drawing relacionados en una misma
>'carpeta'. Para mi el map es mas como un mxd de arcmap, pero no un
>repositorio. Aunque en última instancia podría ser una opción
>utilizar el map como repositorio.
> >
> > Igualmente estoy teniendo muchos problemas con la topología, he
>estado tratando de hacer unos dissolve sobre los drawing del mundo que
>trae el manifold, a partir de un campo de regiones que cree en el
>drawing y no resulta.
> >
> >
> > En principio baje la resolución del mapa original a 0,01 grados,
>apliqué el Normalize topology y luego el dissolve, para obtener las
>capas de áreas y subáreas en dos proyectos .map distintos, sin
>embargo, en algunas fronteras, mas que todo en el caso de Suramerica y
>la frontera con México todavía quedan gaps. He vuelto a aplicar el
>normalize topology, pero no hace nada. qué podría hacer?
> >
> >
> >
> > Otras vez, muchas gracias...
> >
> >
> >
> > saludos,
> >
> >
> >
> > Carlos, Panamá
> >
> >
> > Cheryl Sharpe <cmsharpe@c...> wrote:
> > Saludos, Carlos
> >
> > ¿No es el "map" lo que quieres? Pensé que el "map" tuviera la mayor
> > parte de la funcionalidad de la "geodatabase" de ERSI. Puedo estar
> > equivocada....
> >
> > Cheryl, EEUU
> >
> >
> > --- En manifold-gis@..., "cagb78" <cagb78@y...> escribió:
> > > Saludos a todos, soy un usuario nuevo de Manifold, ahora estoy usando
> > > la versión 6.5, queria saber si en Manifold se puede construir algo
> > > parecido a la geobase de ESRI...si existe, donde está en el
> > > manual...he visto algo sobre dynamic drawing, pero no estoy muy claro
> > > todavia de q va...
> > >
> > > ok saludos, muchas gracias y q tengan un buen día
> > >
> > > carlos gordon
> > > Panama
> >
> >
> >
> >
> > ---------------------------------
> > Enlaces de Yahoo! Grupos
> >
> > Para visitar el sitio web del grupo, andá a:
> > http://ar.groups.yahoo.com/group/manifold-gis/
> >
> > Para cancelar tu suscripción a este grupo, enviá un mensaje a:
> > manifold-gis-unsubscribe@...
> >
> > El uso de Yahoo! Grupos está sujeto a las Condiciones del
>servicio de Yahoo!.
> >
> >
> >
> > ---------------------------------
> > Yahoo! Music Unlimited - Access over 1 million songs. Try it free.
>
>

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