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| Subject: | Re: [gislist] OBJECT ORIENTED GIS |
| Date: |
06/29/2007 02:17:49 AM |
| From: |
Santiago Martin Alfageme |
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Thanks a lot, Landon
My Thesis proposal deals with a pure object-oriented model applied to
geological cartography.So graphical aspects are significant. That means
(from a OO perspective) graphical representation beyond point, line and
polygon. =
For example faults in a digitized geological map are composed of several
polylines with (usually) a code number. In Spanish cartography even a single
fault can contain segments with different symbology (i.e.: real fault,
conjectural fault). All these elements belong to a unique entity. Problem:
I would like to identify that single fault at one stroke. From
Entity-Relationship and Field-based systems an option is to develop a query
program based on attributes of new fields (ie. Fault name). =
00 would treat (I, suppose) that as an object of class fault and an ordered
association (OO association) of lines, even with behaviour: drawn as a
polygon at large scale and as a line at little scale. =
There are much more problems to solve. Geodatabase from Esri have been tried
to deal with them but data model is unsatisfactory because in deep is strong
graphical dependent. =
So the big question is: Can I with OpenJUMP design a full data model with
object-oriented foundations and constructs: classes, methods, interfaces,
encapsulation, inheritance, aggregation, association, etc.? =
By the way: in order to understand 00 concepts I am learning Java
programming now. I would be great if I can use OpenJump.
Thanks in advance and I beg your pardon for such a sermon!
=
---------------------------------------------------------------------
Santiago Martin Alfageme =
IGME - Instituto Geologico y Minero de Espa=F1a
Geolog=EDa y Geof=EDsica
c/ La Calera, 1 =
28760 Tres Cantos (Madrid)
Tlf.: +34 91 728 7287
Fax: +34 91 803 6200
-----Mensaje original-----
De: Landon Blake [mailto:lblake@ksninc.com] =
Enviado el: jueves, 28 de junio de 2007 18:41
Para: Santiago Martin Alfageme
Asunto: RE: [gislist] OBJECT ORIENTED GIS
Santiago,
Object-Oriented programming is all over the GIS Programming World. I'm not
sure about the details in other programming languages, but I work as a
programmer for the JUMP Pilot Project. The JPP maintains and develops
OpenJUMP, which is an open source GIS program written in Java using only
object-oriented techniques. (You can use OpenJUMP to connect to a RDBMS, but
internally everything is an object.)
I hope that answers your question.
If your looking for an open source object-oriented GIS program to help you
with your thesis OpenJUMP would be a great candidate. Let me know if you
would be interested and we can talk about it some more.
The Sunburned Surveyor
-----Original Message-----
From: gislist-bounces@lists.geocomm.com
[mailto:gislist-bounces@lists.geocomm.com] On Behalf Of Santiago Martin
Alfageme
Sent: Thursday, June 28, 2007 1:15 AM
To: gislist@lists.geocomm.com
Subject: [gislist] OBJECT ORIENTED GIS
This is my first post in the list:
I am keen on object-oriented model (OO) applied to gis. I would like to
apply the model to geologic cartography. Main reason is a Phd proposal. =
My feeling is that the model is not fully applied on GIS: (i.e.:
geodatabases still are, in deep, graphical-dependent or oracle-spatial is a
mix between relational model and OO).
I haven=B4t tested Smallworld so I can=B4t see the full picture about comme=
rcial
soft. An the other hand there is a lot of free Java programming around
......
but not sure if really develop OO ideas exposed in the well-know Egenhofer
or Worboys works.
=
Consulting bibliography I=B4ve realized that there=B4s a lot in the 90=B4s =
years
(i.e. Monica Wachowicz Phd and published book ) years but odd in recent
times.
Why?. What happens with OO?. Have I missed something?. It=B4s really
out-of-state-of-the-art?
Any information about this thema is wellcome
Thanks in advance =
---------------------------------------------------------------------
Santiago Martin Alfageme =
Spanish Geological Survey (IGME)
Geolog=EDa y Geof=EDsica
c/ La Calera, 1 =
28760 Tres Cantos (Madrid)
Tlf.: +34 91 728 7287
Fax: +34 91 803 6200
s.martin@igme.es
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