I think we need to identify the possible problem areas and those things that would be useful to the students. Not all students will have the same needs.
The first is we really want to avoid students tracing building outlines in iD. Experience has shown they aren't very good at it. JOSM and the building_tool plugin works well but needs some preplanning. If NRC LiDar building outlines come off that gets round the problem. First to get an understanding of GIS basics we need to reduce the idea of an electronic map to two things. Nodes and ways and we add tags to these. You can call them different things but basically the nodes have a Longitude and Latitude tag and the ways connect them. Tag the way as a highway and you have a road. Tag it as a waterway and you have a river. Four nodes with four ways connecting them gives you the outline of a building. Closed ways are a special case and take tags such as building=yes. Because my background is technical I would suggest a mention of XML format of fire type .osm. It evolved from SGML and is today used in many ways including the internal file format for Microsoft Word. An exercise might be to extract a building from OSM in JOSM save the file and look at it in something such as notepad++ <osm version='0.6' generator='JOSM'> <bounds minlat='45.4755177' minlon='-75.4792151' maxlat='45.475623' maxlon='-75.4790086' origin='CGImap 0.6.0 (20825 thorn-01.openstreetmap.org)' /> <node id='4664537912' timestamp='2017-02-04T23:55:55Z' uid='5241993' user='DenisCarriere_import' version='1' changeset='45818106' lat='45.475569' lon='-75.479028' /> <node id='4664537993' timestamp='2017-02-04T23:55:56Z' uid='5241993' user='DenisCarriere_import' version='1' changeset='45818106' lat='45.475519' lon='-75.478978' /> <node id='4664540965' timestamp='2017-02-04T23:56:33Z' uid='5241993' user='DenisCarriere_import' version='1' changeset='45818106' lat='45.475584' lon='-75.479242' /> <node id='4664542944' timestamp='2017-02-04T23:56:59Z' uid='5241993' user='DenisCarriere_import' version='1' changeset='45818106' lat='45.475501' lon='-75.479064' /> <node id='4664545143' timestamp='2017-02-04T23:57:28Z' uid='5241993' user='DenisCarriere_import' version='1' changeset='45818106' lat='45.475563' lon='-75.479041' /> <node id='4664546447' timestamp='2017-02-04T23:57:43Z' uid='5241993' user='DenisCarriere_import' version='1' changeset='45818106' lat='45.475484' lon='-75.479048' /> <node id='4664547023' timestamp='2017-02-04T23:57:53Z' uid='5241993' user='DenisCarriere_import' version='1' changeset='45818137' lat='45.47547' lon='-75.479126' /> <node id='4664547073' timestamp='2017-02-04T23:57:53Z' uid='5241993' user='DenisCarriere_import' version='1' changeset='45818137' lat='45.475643' lon='-75.479122' /> <way id='472241168' timestamp='2017-10-25T00:16:10Z' uid='5633991' user='Matthew Darwin' version='3' changeset='53222843'> <nd ref='4664547073' /> <nd ref='4664545143' /> <nd ref='4664537912' /> <nd ref='4664537993' /> <nd ref='4664546447' /> <nd ref='4664542944' /> <nd ref='4664547023' /> <nd ref='4664540965' /> <nd ref='4664547073' /> <tag k='addr:housenumber' v='767' /> <tag k='addr:street' v='Merkley Drive' /> <tag k='building' v='detached' /> <tag k='building:levels' v='2' /> <tag k='source' v='City of Ottawa' /> </way> </osm> You can see from the idents around way and /way the tags for the building are grouped together. The important thing about .xml are the tags. In a conventional database if a tag is unrecognised strange things can happen. With XML only data from within recognised tags are used which means new tags can be added without affecting the normal processing. It is often used as a file transfer format from one system to another. On a less technical level often people have difficulty in grasping that the map shown on www.openstreetmap.org is not the real live map. It would be useful to mention the concept of rendering and to show the map rendered in different ways. OSMand comes to mind. Look at map layers on openstreetmap.org. For the building project itself it would be useful to look at how we extract the data from the map. With paper map you'd need to count the buildings but with an electronic map a program can count them for you. It would be useful if someone could produce a sample in R that takes a .osm file and counts the buildings. A task from that would be to extend it to count the number of two storey (story) buildings. Legally in Canada by act of parliament "storey" is used rather than the American "story". Discuss perhaps? Local knowledge is always preferred in OSM. So I would suggest for the mapathon ensure the building outlines are in place then ask the students to enrich the map by adding tags. Run R before and after to show the differences and the impact. Dig into https://wiki.openstreetmap.org/wiki/Education and see if there is anything useful. Be aware there are many different points of view within OpenStreetMap, as an example map features and taginfo often differ. Map features is someone's idea of this is how to tag taginfo is this are the tags that have been used. Could students explain why this is so? OpenStreetMap isn't just about geography and producing a printed map. Maperitive is an excellent tool for creating your own map either to the screen or printed by the way and it can be customised. Making a simple change is easy but its almost a programming language in its own right. The suggestions may or may not be relevant but they cover a fairly wide range of subjects. Have fun Cheerio John On 30 January 2018 at 10:49, Jonathan Brown <jonab...@gmail.com> wrote: > I don’t mind reviewing the OSM education wiki for lessons learned and > “promising practices” and seeing how it might inform the design of a > mapathon event aligned to the K-12 curricula and postsecondary capstone > project model. It will be messy, but that’s the nature of the beast. To use > the jargon, start small, fail fast and apply what you learn to the next > event. > > > > Durham Region is planning on hosting a mapathon event as early as this > March. I’m working with the GIS Supervisor who also teaches GIS to 2nd > year environmental science students at Durham College. I also have a > teacher who is very good at working with students who normally would not > participate in these kinds of events, but who have street knowledge. > > > > Jamie Boyd and Moses Iziomon at the Treasury Board’s Open Government > branch may have some funding to support Alessandro’s group in helping to > engage the OSM “crowdmappers” and citizen science practitioners. This could > align to their 2 year open government plan http://open.canada.ca/en/ > 4plan/creating-canadas-4th-plan-open-government-2018-20. They are looking > for workshop ideas for early May. > > > > Does anyone know of OSM expertise that we could tap into for a mapathon > event in the Durham Region? Thanks. > > > > > > Jonathan > > > >
_______________________________________________ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca