These nodes can be used to help identify missing island coastlines. In a related note, Mike Collinson also imported island and islet names as place= island nodes from the public domain GNS database in around April of 2008. The PGS data, which is a software-based extraction of coastlines from Landsat, is also available and has been post-processed and provided by Ian Haylock for the Philippines. For most of the Philippines, the public domain Landsat imagery, having a low resolution of around 15 meters (much better than SRTM), provides the best freely-available data for correcting the coastlines. There have been sporadic efforts to refine and correct these coastlines in the intervening years but majority of the coastlines remain uncorrected at the start of 2010.Ĭurrently, there is an ongoing collaborative effort, started in June 2010, to finally refine and correct these SRTM-derived coastlines to better match available data. Furthermore, some smaller islands and islets don't have coastlines visible on the SRTM-derived coastlines or are merged with their larger neighbors. But in other parts of the country, the lack of high-resolution imagery, the generally low priority attached to coastlines (compared to streets and POIs), and the tediousness of correcting them has led to the sawtooth coastlines persisting for years since the initial import. In areas that have high-resolution satellite imagery available, such as in Metro Manila and Davao City via Yahoo!, the coastlines have already been refined and corrected to match the imagery. The problem with SRTM data is that it has a resolution of about 90 meters and since the data is in a raster format (i.e., pixellated), the coastlines therefore appear as jagged "sawtooth" shapes. Practically all of the coastlines of the Philippines were imported from a crude coastline shapefile generated from SRTM data back in 2007. The Metro Map solution includes the Replicating Objects as well as the Switching Objects, enabling the transport managers, metro stations builders as well as transport project managers to end up having a professionally looking vector graphic document.Sawtooth coastlines and the fixed version. The Metro Map solution enables to create the needed metro maps, bus and other transport maps and transport schemes, as well as the tube-style infographics and route maps, allowing one to control the direction in which any ConceptDraw DIAGRAM user can create new stations, add text icons/labels and change the lengths of the pre-made drawings as the solution contains such design objects as the representations of the Lines, the Landmarks, and the Stations.
#METRO WEBMAP SOFTWARE#
It is always possible to create the needed metro map by using the ConceptDraw DIAGRAM diagramming and drawing software either from a scratch or by editing the already created drawings by using the Metro Map solution. It is usually used by the non-native English speakers. Metro is known to be the most common term for underground rapid transit systems. Sometimes they have such intersections between two rapid transit lines, being unchallenged in its ability to transport too many people quickly over some short distances. Nevertheless, some of the rapid transit systems have the so-called “at-grade intersections” between a rapid transit line and a road.
They require the custom-made trains for minimizing the gaps between a platform and a train.īeing integrated with other public transport, they are operated by the same public transport authorities. The stations usually have high platforms, having no steps inside the trains. Sometimes some of such systems use guided rubber tires, monorail or magnetic levitation. They usually use the electric multiple rail tracks. Modern services on rapid transit systems may be provided on the designated lines between stations. They cannot be accessed by pedestrians or other vehicles, often being grade separated either on elevated railways or in tunnels. They operate on an exclusive right-of-way. Unlike trams or buses, such rapid transit systems are electric railways. It is a type of a high-capacity public transport usually found in most of the urban areas all over the world. Mass rapid transit is also known to be called as a heavy rail, a metro, a subway, a tube, or an underground.
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