selection of best view angle, drawing of
three dimensional landscape view, etc.. In
the following, we will cite the management
information library of Shanghai Botanical
Garden as an excample to introduce the
method of establishing the management
information library of special greening
areas.
Shanghai Botanical Garden is the largest
urban botanical garden in our country. It
occupies an area of 800,000 square meters
and has nearly 200 varieties of plants,
including almost all the typical plant
varieties in the southern cities of our
country. It is a comprehensive garden that
combines horticultural research, planting
and sales and sight seeing. That is the
reason why the management work is rather
complicated.
In order to meet the accuracy requirement
for the screen designing and mapping,
the center of the tree stock has to
have a correct coordinate in the library.
Thus we place the control network and pre-
pare the plant distribution map according
to the measurement accuracy requirement
for the 1:500 scale map.
First we place the city grade 3 traverse
and spur traverse on the main roads of the
£arden. The all distance on the garden is
measured by steel rule. Then we punctuate
the control points on the aerial photoes
and map board and at the same time,actual-
ly investegate outstanding trees, indepen-
dent trees, rare trees and ancient trees
and mark them on the aerial photoes. We
correct the photo errors by these control
points and translate the investigation
result to the map board. At the same time
we draw out the overlay scope of arbor and
bush crowns, water, roads and buildings to
make a plant distribution map. According
to the aerial photo interpretation, actual
investigation and garden archives, we fur-
ther divide smaller and more simple arbor
and bush groups in the overlay scope of
arbor and bush crowns,and then investigate
and record the name, standing conditions,
time of planting, stock diameter, crown
shape of outstanding trees and arbor and
bush groups. At the same time, we draw out
lacing con-
aerial photo
actual inves-
kilometer grid according to the control
points. Then we further sub-divide them to
10mx10m grid to measure and mark the GOR
and GBQ etc. in each grid, before charting
the so-called " plant information chart",
which is the main basis for establishing
the library. In thóse areas where accurate
garden designing is necessary, the method
of actually placed building square grid
may be used to actually measure the data
to be directly inputted into the computer.
2. The establishment of management infor-
mation library of special greening
areas and output functions
Based on the plant information chart, the
two input forms namely grid and poligon
are used. For the grid-type GOR and GBQ
data the grid-type input form is used. As
to other point-and-line-form objects and
square image, poligon-type input form is
used. When certain software for inquiry,
display, amendment, drawing is provided on
the basis of geographical information
package , the greening management infor-
mation library for this special area
is preliminarily completed. The working
procedure of establishing the library is
shown in Fig.6.
Through connecting the control network
between the garden's and the whole city's,
we make the plane coordinate of the mana-
gement information library of various
special greening areas be the same as the
coordinate of the greening information
library of the whole city, and adopt the
the uniform codes. In this way each mana-
gement information library may be inlaïd
in the 2-D GOR data library or 3-D GBQ
information library at any time.
In the subsystem of horticultural tech -
nology management, a number of charts of
the standing conditions, GOR, GBQ, growth
case of the said special areas may be
charted by means of some drawing software.
And in the subsystem of garden landscape
designing, the techniques such as amplifi-
cation of sub-region, screen wandering may
be used to display the landscape or image.
Use may also be made of visual enlighte-
ning technique to imitate the situation in
standing condition chart
GOR chart
GBQ distribution chart
plant variety char
plant growth case chart
À
sub-system of horticultural
technology management
tigation out- interpretatio
standing tree and actual
investigation
of plant
control cor information map
rection &
plant
infor-
mation
pattern] input
distri-
bution
management
information
polygonal
grid- library of
type special gree-
data input ning area
grid-type
statistics
of GOR & GBQ
Plant distri
bution map
sub-system of garden lands-
cape design
landscape overlook chart
3-D view chart of itinerary
3-D view chart of important
Scenic point
Fig. 6 Frame-diagram of the working procedure of establishing the
management information library of special greening areas
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