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1993-05-18
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Topographer ReadMe file Version 1.00
====================================
See the file Tutor to get a quick rundown of Topographer.
The file DemoHelp1 provides additional information.
DO NOT edit the draw files in directory !Topo2D.Art as this this will
cause Topo to fail.
If you get an error message such as 'Font not found' double click on the
!Fonts application supplied on the Topographer disc 1. When you
catalogue disc one, the !Fonts folder will automatically install the
fonts unless you already have a font path set eg on a hard disc or in the
RISC OS 3 Rom. If you are using a non outline font manager you may still
have a font path set and so the new fonts will not automatically install
themselves. In this case click on the !Fonts directory.
The file, Demo, supplied in the Maps directory on the Topo3D disc will not
load on a 1Mb computer.
Since printing the manual we have had some feedback regarding the
coordinates system in Topographer and we have made the following changes to
provide the best combination of facilities whilst following the guidelines
for the National Curriculum.
Grid scales can now only be set in multiples of ten. This is achieved by
selecting grid sizes of 10m, 100m, 1km or 10km using the buttons in the
Grid window. The old method of setting the Grid size as described on page 26
of the manual is now obsolete.
In addition, we have now added a facility to allow you to select how many
digits are used in the coordinates window. You can select between 2 and 5
digits, giving you very accurate positioning. The selection of the number of
digits is also done in the Grid window using buttons. This setting is
saved with the map.
The normal maps used in the National Curriculum are 1:25000 and 1:50000, the
latter being the more popular. These have scales of 4cm to 1km and 2cm to
1km respectively. In these cases the area covered by one square on the
default grid is always 1km (1000m) square ie the grid on the 1:25000 map is
twice the size of that on the 1:50000 map.
Using 3 digits in the coordinates window at these scales allows you to
position features to an accuracy of 100 metres eg 091 means grid 09 plus
1/10th of a grid (each grid is 1000m by default).
For larger scale maps (1:1250 & 1:2500), such as the ones supplied in the
Tutorial, the above accuracy is not good enough for a computer based system.
We suggest that you use 5 digits as used in the Tutorial. This provides
accuracy down to 1 metre if you use the default grid size of 100 metres.
The following table lists the defaults for each map scale:
Scale Size Grid Digits
1:1250 500m 100m 5
1:2500 1000m 100m 5
1:10000 5000m 1km 3
1:25000 20000m 1km 3
1:50000 40000m 1km 3
1:125000 100000m 10km 2
1:250000 200000m 10km 2
1:625000 600000m 10km 2
New features:
=============
Road labels
===========
A new feature not documented in the manual has been added. This is Road
label and is found at the bottom of the Features window between the two
'County' labels. It is shown as a button marked 'A30'. Click on this button
and enter the road label into the input box and then click on OK. To place
the road label click onto the map at the point that you want the label to
appear. Topographer uses some intelligence in positioning the road label.
It finds the nearest road to where you click and then finds the nearest
road segment (a straight bit between two points as shown when you edit
the road) and positions the label in the middle of that segment. The
label is offset from the road by the length of the text and the label adopts
the colour of the road. If the position is not to your liking you can select
the label and move it to another position.
Coordinates window
==================
A coordinates window has been added to the Topo3D program. The number of
digits displayed is taken from the settings made in Topo2D.
Print information:
==================
In the current version the Print option in Topo2D is not fully implemented.
It was only intended to print out one page and if you wanted a map that
would not fit on a single page then you were to adjust the origin so that
you could print the next page. The changing of the origin is not implemented
so you will only ever get the bottom left corner of any map. There are two
possible solutions to this:
1) Alter the map scale using the Map =>Scale option. For example the map
'Later' could be set to a scale of 1:5000 so that the print fills 3/4 of an
A4 page.
2) You can export the map as a Draw file. If you load it into Draw you can
scale the map to fit on a single page. Alternatively, you could use a
commercial print tiling program to print it out onto several sheets.
Known Bugs:
===========
In certain low memory conditions Topo3D can fail with an error 'Failed to
create sprite' or similar. The application will then remove itself from the
icon bar. This will be fixed in future releases but to avoid losing your
maps ensure that you save them to disc before exporting to Topo3D.
Saving a Draw file from Topo directly into Impression does not always
give the expected results. To avoid this save the file into Draw first, do a
'Group all' and save the selection into Impression which then accepts it
okay.
The Future
==========
There are plans to enhance and develop Topographer and any ideas or wishes
that you have will be warmly welcomed. Please send them, in writing, to:
D. Clare
Clares Micro Supplies
98 Middlewich Road
Northwich
Cheshire
CW9 7DA
We would also appreciate seeing any maps that you create and we would like
to build up a library. If you send us maps on a disc we will send you back
some maps in return. In this way all users can share their maps with others
who will appreciate them. Please send them to the above address.