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It was warped to a real coordinate system using the software 
module called I/RAS C. In the final outputs each land use class 
is displayed with a certain color, which is read from a color 
table. Colors were designed by editing the color table. 
2.2 Digital elevation model 
NBS produces digital elevation models based on digitized 
contour lines of the base map. DEM has a grid structure and 
the size of one pixel is 50 x 50 meters. Software that generates 
the model is tailored in NBS. Hill shadings for map 
presentations can also be computed from the DEM. 
Height information in the Guide Map for Rural Areas is 
represented as elevation zones. No hill shadings were used. 
Zones were generated as a combination of the satellite image 
and the elevation model. Intergraph's MapPublisher software 
was used to run the logical operations between elevation 
model and satellite image. 
2.3 Roads 
Road Database 
NBS is establishing a nationwide Road Database. The follo- 
wing linear objects are described in the database: middle line 
of the road, bridge, ferry connection and crossing. Other geo- 
metric objects in the database are parallel lanes, railway 
junction, light traffic crossing, barrier and dead-end road 
junction. Geometric objects have the following attributes: the 
name and the number of the road, surfacing of the road, the 
road maintainer, trafficability and one-way or two-way 
information (Marttinen, 1991). Road classification is based on 
the Basic Map 1:10 000/1:20 000. The database is by now in 
the design stage, complete digital information will be achieved 
sometime in the future. 
Digitizing 
In our pilot project, roads were digitized in the following stages: 
first, the Topographic Map 1:50 000 was scanned. Second, the 
so-called "red roads" were vectorized automatically using Inter- 
graph's I/VEC software. "Red roads" include the main and local 
roads. Third, we scanned the Basic Maps within the test area. 
Fourth, all the remaining trafficable roads were digitized on the 
screen. At the same time, road names were stored and roads 
were classified. Here, the classification was based on the road 
map 1:200 000 (GT-map). 
2.4 Residential information 
There is a digital nationwide building register in Finland 
including coordinates, address, use, owner and some other 
details of every building. We transferred this register into 
Intergraph’s graphics with an application program made in 
HUT. The real estate identifier was stored into the graphic 
element as an attribute. 
2.5 Other sources 
Place-names 
Place-names of the Finnish Aeronautical chart 1:500 000 and 
road map 1:200 000 (GT-map) are available in digital format. 
These place-names are too sparse for the guide map 1:50 000. 
Therefore we collected all names by digitizing on the screen. 
Text font and size were chosen by the type of the object. 
Municipal boundaries 
The Finnish National Board of Survey has produced a digital 
file of municipal boundaries. This file was transferred into 
Intergraph's file format. 
Addresses 
In the new addressing system in Finland, every house will have 
an address that is composed of the name of the road and a 
number that indicates distance from the starting point of the 
road. Numbers were generated by a routine of the MicroStation 
software plus an application program (Figure 1). 
Railroads & power lines 
Railroads and power lines were digitized on the screen by 
utilizing the scanned Basic Map 1:10 000/1:20 000. 
Waterways 
Rivers and creeks were digitized on the screen. Digitizing was 
based on the scanned water element of the Topographic Map 
1:50 000. 
Coast-lines 
Coast-lines were produced by an automatic vectorization pro- 
cess. The process was performed with Intergraph's I/VEC 
software. Satellite data was used as input data. 
3. DESIGNING THE MAP COLORS, 
SYMBOLOGY, AND LAYOUT 
3.1 Starting points for designing 
An essential part of this research was to design a map 
presentation that matches the requirements of prospective map 
users as well as possible. The primary user of this guide map 
is a car driver. Therefore, the roads must be clearly presented 
on the map. In addition, objects which are in the close vicinity 
of roads are important. The map user must have some fixed 
points to help navigating. Railroads, power lines and waterways 
167