Streetcars and Spatial Analysis.
What are your proposals for streetcars and or trolleybuses in Brooklyn and New York City? Here past trackage maps are presented and analyzed in todays environment. Geospatial analytical methods are discussed regarding new routes.
Please scroll down the page to see present and archive blogs.
GRASS 6.4.1 Hydrology Program Predicts a River Channel on the Sea Beach Line
The GRASS 6.4.1 spatial analysis program has an hydrology program that uses local elevations. Just bringing in the subway line layer as a "river" produced a map that shows a low level (in yellow) river channel at the location of the Sea Beach Line. The "river channel" is more pronounced in the lower part of the map where the elevations are generally lower. Notice the other rapid transit lines, indicated by X's as station stops do not have this effect. To the left of the Sea Beach Line in the West End Elevated, to the east is the Culver El. Further to the east is the Brighton Line on embankment and another color shows that it is not a channel. The green line north of Sheepshead Bay is the Belt Parkway. The hydrology "carve" program thus shows potential river streams, in this case, the Sea Beach Line that became flooded during Hurricane Sandy and is presented in an earlier post.