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Thursday, 16 May 2013

North-South Expressway Highway Map


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After one month plus working on gathering and organizing the data, finally, it is done. PLUS FM/ HIS (+) contains around 810 geographical features and facilities along the North South Highway (Malaysia).
Abbreviation explained:
PLUS FM- PLUS is the common name for the highway and FM stands for Facility (or Feature Map)
HIS (+)- Highway Information System (PLUS)

Both maps (inc. link below) are two takes on the geographical data that I have collected over the years on field and online research. Facilities/ Features shown are:

  1. SOS (Emergency telephones)- not publicly available online
  2. Rest Areas
  3. Laybys
  4. Motorcycle Sheds- not publicly available online
  5. Points of Interest
  6. Interchanges
  7. Tolls
  8. Named River Crossings- mostly not publicly available online
PLEASE ZOOM IN TO SEE MORE DETAILS (i.e. Facilities)

A link to another take on this map:
http://www.arcgis.com/explorer/?open=3548c8b8efae4077a8745f61581ec2e3&extent=11244978.3274989,513126.407464766,11261574.7459163,520428.345582528

Important Notes on the Map



Producer: Danesh Prakash Chacko (April-May 2013)

Source: Personal Field Collection/ GPS Collection, Panoramio, Wikipedia, PLUS (official website) Google Maps, Google Earth, Bing Maps, Foursquare.

Accuracy: Refer to accuracy statement found in each feature found in the map. Where it is left blank, it should be assumed as point positioned at 1 km viewing altitude in Google Earth or Navman GPS accuracy level (for SOS).Use the positional accuracy as a guide only, not for in-depth accurate mapping studies.

Currency: The map data as current of November 2012 (for rest areas and laybys, refer to date currency of PLUS website). However, the producer asks the users to use discretion when using the map and validate themselves on the highway.

Disclaimer: The producer has done his best to collect the information with relevant positional and attribute accuracy. His personal notes have been cross-referenced with other sources such as Panoramio and vice-versa. However, the producer disclaims himself for any mishaps or intentional/unintentional misuse of the data as a result using the map. Producer have omitted some of the data to preserve the general integrity of the data accuracy. In future, more data will be added to complete the map

Acknowledgement: I, the producer, would like to acknowledge fully all the online references (stated above) which were used for the completion of the project. I hereby ask all users to quote all the references mentioned above (or in the map) when the data is being utilized elsewhere. This is in spirit of recognition of other unknown contributors and respecting copyrights.

THE PRODUCER WILL INFORM THROUGH HIS BLOG FOR ANY UPDATES/ADDITIONS/OMISSIONS FOR THE MAP. ANY UNAUTHORIZED EDITS WITHOUT CONSENT OF THE PRODUCER WILL RESULT THE PRODUCER DISQUALIFY HIMSELF FROM ANY WRONG-DOINGS AND/OR ITS SUBSEQUENT CONSEQUENCES

MINOR NOTES (FAQ)

1) What is a viewing altitude mentioned in accuracy section?
Viewing altitude of Google Earth

You will encounter a statement saying called 'Google Earth 1.5 km viewing altitude'. The position of the facilities such as Fuel Stations were placemarked by me at 1.5 km (e.g.) height at Google Earth. The above image shows a red circle referring to viewing altitude. If I ever bring this across to an online Google Map/Earth, you can zoom in to this facility with great accuracy until hits 1.5 km viewing altitude

2) I find some of the information sections left empty for facilities. Why is this so?
For attributes (the description of the facilities), it means either this facility do not have particular attribute (laybys that do not sell fruits, so when you click the pin, fruit section is empty) or the accuracy statement was mysteriously have not been added. Over time, I may add the accuracy statement that were missing for selected facility categories (i.e. Emergency Telephones)

3) What do you mean 'digitized at 1:20000 in ArcGIS'?
Let's take an example- River Crossings. Most of the river crossings were place marked in Google Earth. They were subsequently imported to ArcGIS (mapping software). Over time, I realized that I missed two or three river crossings. To save time, I manually added them to the nearest .000 degrees (for latitude or longitude) in ArcGIS map at the scale of 1:20 000.

4) I noticed in reality, emergency telephones are not exactly correspond to the highway chainages listed in the map. Is there an error in your map?
Most of the emergency telephones I listed in the map have some highway chainage. For example, there is an SOS on Sungai Buloh exit ramp and its highway chainage is KM 453.9. In reality, the highway chainage listed is the one closest to this SOS. It doesn't mean this SOS is at KM 453.9. At rare instances, both the chainage and SOS location would correspond.

2 comments:

  1. Terima Kasih! If you have any suggestions of improvement, tell me so here.

    ReplyDelete