Geoscience Reference
In-Depth Information
Fig. 17 Scheme for analysis by Python layers and their important attributes
raster which doesn
'
t consider the altitude. This difference in
fl
uences the increase of
the road dif
culty compared to the
fl
flat surface. These steps are implemented by
ModelBuilder and point
feature class
is
the result
feature
class called
Points_join_Mam_aspect_minus in Fig. 17 .
The next part takes open-source programming language Python that is both
powerful and easy to learn. Particular steps are re
fl
ected in the following scheme
(Fig. 17 ) where these components are used.
Explanatory text:
bike_trail_net_2012
input feature class involving street net and bike trail
sections with actual
fields
select_sd
selection of bike trails except bridges and tunnels
btd_net_split_line
seperation of bike trail sections to line segments, new
geometry and completion bearing attribute (azimuth)
buffer_split_line
10 m buffer of the line segments, bearing (line azimuth)
select_bt
selection of bridges and tunnels
point_bt
beginnings and endings of bridges and tunnels
buffer_point_bt
10 m buffer of endpoints of bridges and tunnels
buffer_line_bt
10 buffer of line of bridges and tunnels
buffer_line_points_bt
symmetrical difference buffer_line_bt and buffer_point_bt
intersect_sd
intersect buffer_split_line and Points_join_Mam_aspect_
minus
intersect_point_bt
intersect buffer_point_bt and Points_join_Mam_aspect_
minus
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