Workshop_Indoor and outdoor mapping


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Workshop on mapping accessibility for disabled people
on the WWU Campus.

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Workshop_Indoor and outdoor mapping

  1. 1. Mapping accessibility on the WWU campus   1  
  2. 2. •  In order to represent accessibility information digitally, we have to break down the real-life environment into its discrete features (objects, elements) : -  Stairs -  Ramps -  Corridors, etc. 2  
  3. 3. •  Each object has a set of properties (attributes) describing it from the viewpoint of accessibility: - eg. a ramp has a particular slope (inclination) and width that make it (in)accessible for a wheelchair user 3  
  4. 4. Outdoor objects and accessibility attributes   Outdoor Object Attributes Ramps Width Inclination Handrail Manoeuvrin g Space Steps Lighting Coloured Markings Tread Depth Handrail Pathways Surface Inclination Parking Space Number of Places for Wheelchair Distance to Entrance Building Wheelchair Accessible Width Automatic Opening/Closing Bell / Intercom 4  
  5. 5. Indoor objects and accessibility attributes 5  
  6. 6. Description sheets for each type of object – outdoor or indoor -­‐ after creating (or finding) a digital element to represent a real-life   object, make note of its ID as well as values for its attributes                      a8ributes           element  ID   retrieved  from   OpenStreetMap  /     indoor  mapping  app   a8ribute  value   a8ribute  values  can  be  numbers  or   sets  of  predefined  opBons   (eg.  good/poor/none):  see  file   “Kriterien”  for  possible  values)    6  
  7. 7. Objects in OpenStreetMap (OSM) •  OSM lets us create digital representations of outdoor objects •  Real-life objects are represented in OSM by using geometric elements: - points (known as ‘nodes’ in OSM) - lines (‘ways’), and - areas (‘closed ways’) •  Each element can be described (‘tagged’) to store info about attributes of the represented object 7  
  8. 8. OSM on smartphones •!! 8  
  9. 9. Desktop OSM: JOSM •  1. Download current map data from OpenStreetMap •  2. Edit map elements using satellite imagery, GPS, field papers and notes as well as using our knowledge of a place •  3. Save changes to OpenStreetMap 9  
  10. 10. Nodes in OSM •  Nodes in OSM are point elements. •  They define a single geospatial point, using a latitude and longitude. 10  
  11. 11. Ways in OSM •  Way is a general term for a series of joined nodes. •  They usually represent linear objects (vectors), such as rivers or roads. •  Ways can also represent solid polygons (areas), such as buildings or forests. In this case, an area is a way whose first and last node are the same – a closed way. •  Closed ways occasionally represent linear loops, such as highway roundabouts, rather than solid ('filled') areas. 11  
  12. 12. Tags in OSM •  All elements have tags that describe the objects that the elements represent in more detail. •  Tags are organized into keys and values. The general form of a tag is key=value. •  Keys are categories of object properties, such as Land Use for a closed way representing a plot. •  Values specify keys, eg. Land Use=Garden 12  
  13. 13. Example: representing steps (and ramps) in OSM •  After entering a line (‘way’ in OSM) to represent the steps, we need to tag it appropriately: •  highway=steps: “highway“ is a key describing what kind of linear element the way is •  incline=20%: “incline” is a key to store the slope •  ramp=yes: if the way represents a ramp rather than steps, this tag is needed •  handrail=yes: is there a handrail? •  etc. 13  
  14. 14. Tags in OSM   •  There are numerous tags available – check the links for a description of what different keys and values mean - referer= %2F - •  To store accessibility information, we can use some of the available tags; eg. width=120cm 14  
  15. 15. Accessibility-related OSM tags   Outdoor  Object     A-ributes     Ramps   highway=steps   ramp=yes     Width     width=*     InclinaBon     Handrail     Manoeuvring   incline=*     handrail=yes/ Space     no     Steps       highway=steps     LighBng     Coloured   Markings     Pathways     highway=””     Surface       surface=””     InclinaBon     •  eans  that  the  value  for  the   m incline=*     key  has  to  be  numerical   Tread  Depth     Handrail     handrail=yes/ no     Parking  Space     Number  of  Places   Distance  to   “”  means  that  the  value  for   amenity=parking     for  Wheelchair   Entrance     the  key  is  a  string  of  characters     capacity:disabled=   yes/no/number     Building     Wheelchair   building=entrance     Accessible     wheelchair=yes/ limited/no     Width     width=*   AutomaBc   Opening/ Closing     Bell  /  Intercom     15  
  16. 16. •  What about accessibility attributes for which keys are not already available in OSM? •  Use description=“” tag, eg. decription=manoeuvring space available •  In any case, adding tags in OSM is welcome but optional: all accessibility attributes should be entered in description sheets (slide 6)! 16  
  17. 17. Indoor Mapping Application by Georg Tschor   17  
  18. 18. Choose source 18  
  19. 19. Create elements: corridor and room 19  
  20. 20. Create elements: door and entrance 20  
  21. 21. Create elements: vertical connection 21  
  22. 22. Upload and edit 22  
  23. 23. Thank you and have fun! •  Contact us for any questions and doubts: •  Elisabet Adeva: •  Nemanja Kostic: 23  
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