RE: [OpenMap Users] A few questions on Openmap

Try using ArcMap. I think that will allow you to convert e00 to shape.

-----Original Message-----
From: Don Dietrick [mailto:dietrick@bbn.com]
Sent: Monday, March 15, 2004 2:35 PM
To: h0119153
Cc: openmap user
Subject: Re: [OpenMap Users] A few questions on Openmap

Hi Steve,

On Mar 4, 2004, at 9:02 PM, h0119153 wrote:

> Hello everybody,
>
> I would like to know:
> 1) I am using SimpleHttpImageServer to display a map by servlet, its
> image
> size should be default, then what is the scale between the pixel and
> the real
> Lan,Lon? I working working on the Pan function.

That depends on the projection.

> 2) Is there any converter converting e00 to shp?

Not that I know of.

>
> 3) I know that there is a e00 layer in openmap4.6, How to use it to
> display
> e00 data on servlet?

You would add an E00Layer to the MapRequestHandler that a servlet uses,
probably by adding an entry to the openmap.properties file.

>
> 4) I need to use openmap to handle a large area. And this area are
> seperated
> into sub-areas.(I have a set of sub-area maps) I want the servlet to
> determine
> which sub-area map to be loaded when user click on a location on that
> large
> map(with larger scale and less detail) which belongs to the right
> sub-area.
>
> I know that Openmap can handle files which are different layers of a
> single
> map, but can it support a number of maps which are parts of a larger
> size map?

This really depends on the data type. There really isn't a mechanism
like this for e00 files, but you could adapt a multiple file mechanism
similar to the one used in the MultiShapeLayer.

For a lot of data, you would probably want to start thinking about
using a database with a spatial query capability to handle multiple
data files. MySQL, PostGRES with PostGIS, Oracle all do this.

- Don

> Please correct me if my approach is wrong. And do anybody know how I
> can
> implenment it?
>
> Sorry for asking so many questions.
> Thank you for your kind attention and help.
>
> Steve
>
>
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