Viktor,
Thank you for your help. I got a
road layer to work, and it will be so much better than the free hand drawing.
As you, and everyone else, can tell, I don’t
do GIS for a living. I work with nonprofit kid’s camps in helping them
plan for the future, and we need maps to view the site as a whole. We
were paying an architect a lot of money to prepare maps, but funding is tight
in the nonprofit kid’s camp world, so we are trying to prepare basic maps
for discussion purposes in-house. So, I’m plugging away at making
reasonable maps.
Pam
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]
Sent: Tuesday, February 08, 2005
12:57 PM
To: [email protected]
Subject: RE: [Maptitude] GIS 101
Pam,
A
general rule of thumb, when creating geographic layers is to keep geometry
types on separate layers. Specifically, in the world of GIS there are primarily
three geometry types:
1.
Points
2.
Lines
3
Polygons (Areas)
So
in your case, it sounds like you are trying or wanting to combine two different
geometry types: Roads (Lines) and Buildings (Areas or Points). This is
discouraged in the world of GIS and perhaps is a built in limitation in
Maptitude. As I see it you have two possible solutions:
1.
Create two separate geographic layers: one for your roads layer or a line layer
and one for your building layers or an area or a point layer. This method will
also make it easier to set up your attribute table, if you treated the two
features separately.
2.
The second solution would only work if your intention is to present your
buildings as areas or foot prints. In this case you would create one geographic
layer as a line feature. Then digitize in all your roads and buildings as lines
only. The problem with this method is that it will be extremely difficult to
efficiently build an attribute table (maybe using generic fields that would be
suitable for roads and building) not to mention the nightmare you'll have
auto-labeling your buildings.
I
highly recommend option 1 and if you are planning of having building
represented as points then this is your only option, even if there is a work
around I would highly discourage it.
As
for the attributes, you'll need to design a database scheme (sounds fancier
than it really is), a scheme simply represents the field names and data types
(numbers, text, etc...), among other things, you want associated to the
information you are collecting. (e.g. road name, access type, pavement,
comments, building name, building type, building use, Square Feet, etc...). The
scheme is exceptionally helpful if you plan on linking your data to other
databases. Either way, this will be more involved than what I outlined here but
hopefully it helped shed a little light on your problem.
Warmest
regards,
Viktor
Keenan de la Hoz - Senior GIS Technician
City
of Phoenix - Street Transportation Department
Design
and Construction Management Division
|
|
Map Boy
<[EMAIL PROTECTED]>
02/08/2005 09:58 AM
Please
respond to Maptitude
|
To: [email protected]
cc:
Subject: RE: [Maptitude]
freehand line size
|
These are very simple questions that are clearly answered in the begining pages
of the Maptitude manual. There you will also find quick tutorials to do
yourself, which many users have found extremely helpful.
Obviously you use a line layer for creation of line features such as streets or
railroads. An area layer would be used for...areas, and points for
points. The attribute fields can be added at any time, but you can start
adding attribute fields after you click on "file" "New".
Just follow the prompts or click on the appropriate dialog box.
Map
Pam Lardear <[EMAIL PROTECTED]> wrote:
Hi
Peter,
Thanks for your response; I'm not quite getting it though.
When I create a new geographic layer, on which I want to draw roads and
buildings, what kind of layer do I use, and what do I do for the attributes?
It would be great help to be able to figure this out.
Pam
Pam Lardear
Run River Enterprises
http://www.runriver.net
315-559-0526
"Helping you find your Way"
-----Original Message-----
From: Peter H. Van Demark [mailto:[EMAIL PROTECTED]
Sent: Tuesday, February 08, 2005 11:03 AM
To: [email protected]
Subject: Re: [Maptitude] freehand line size
Pam:
So far no one has responded to you, so I will try to answer your question:
>I am trying to draw in roads using the freehand line tool, and am having
>tr! ouble with the size. I know there s a setting for changing the
size of
>freehand items when page size changes, but that does not seem to have any
>effect. I have a number of freehand boxes (buildings) which change
sizes
>when I zoom in and out, so the relative size to the map stays in
>proportion. But the roads seem to stay constant, so when I zoom out
the
>road are disproportionately large. What can I do to make all of my
>freehand items stay in proportion when I zoom in and out?
First, features such as roads and buildings are normally created and edited
in geographic files, not as freehand items. Use the File-New command to
create a new line or area geographic file, then use the Tools-Map
Editing-Toolbox command to open the Map Editing toolbox to create and edit
road lines or building areas.
Second, buildings are two-dimensional so as you zoom in or out they should
get larger or ! smaller. Roads are one-dimensional so they should get longer
or shorter, but not wider. The width is controlled by the style of the
layer; choose Map-Layers, highlight the layer, and click Style to change
the style of a layer.
So, if you use geographic files to add road or building layers to your map,
I think you will get better results.
Peter
----------------------------------------------------------------
Peter Van Demark
Director of GIS Products and Training Phone:
617-527-4700
Caliper Corporation
Fax: 617-527-5113
1172 Beacon Street
E-mail: [EMAIL PROTECTED]
Newton MA 02461-9926 Web site: http://www.caliper.com
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