OpenStreetMap Presentation
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Content
OpenStreetMap in Ghana
24.05.2016 CC-BY-SA v4.0
Enock Seth NyamadorVolunteerMapper/ OpenData advocate / OpenStreetMap Ghana@Enock4seth
What is a map to you?
OpenStreetMap
Wikipedia of Maps
osm.org
Map the World from scratch
(No copying)
OPEN DATA
OpenStreetMap was born here in the UK because people wanted, not just a map, but open licensed map data which they're free to use. To do this, we have to create new map data without copying from existing maps. So even though we have great maps of the UK, people did this crazy thing of going out and surveying the world to create a new map from scratch.
So that's the reason OpenStreetMap exists. It's all to do with map data
Open Database License (OdbL)
Free as in FREEDOM
Free to edit
Collaborative
How much?
Tarkwa
How?
Local knowledge
Tracing aerial imagery (Bing, MapBox, etc)
Imports
GPS traces
Someone puts it there, and others look at it and confirm that it is correct
Nodes Ways
Tags
amenity=post_officename=Tarkwa Post Office
highway=residentialname=Post Office Loop
Everything in OpenStreetMap is made up Nodes and Ways, and these things have Tags on them.
A node is a single point. It can be used to represent something like a pub.
A way is line drawn between several nodes. It can be used to represent a linear feature such as a road.
By placing tags on them (these name equals value pairs) this is how we tell the system what this thing is. Tags are the classification system.
We'll see nodes, ways and tags, and this will become clearer when we take a look at the editor
Why tags?
Mapping Techniques
Photo CC-BY-SA Gordon Joly http://flic.kr/p/4KPZ8B & Caterina Marinetti http://www.floodriskaccra.com
Before using an editor to input data, we need to go out and gather some data. There's a whole range of mapping techniques.
You can have fun with gadgets. e.g. use a GPS to record a line of dots. This can form a skeleton view of how a road layout looks. You can use camera to record information. Some people even use a dictaphone to speak into.
But it can be as simple as taking notes on a piece of paper.
Photo of me photo mapping by Gordon Joly http://www.flickr.com/photos/loopzilla/2465042085/
Participate
OnlineOpenStreetMap Editors; iD, Potlatch, JOSM
IOS Go Maps, OSMTracker, OpenMaps
Android OSMTracker, OSMDroid
GPS device
Offlinefieldpapers.org
Editing OpenStreetMap
ID (in browser) - beginner
Potlatch (in browser) - intermediate
Java OpenStreetMap (JOSM) editor - advanced
JOSM
What can I map?
Anything that physically exists and is permanent
Recording data
Names of streetsTypes of streets (trunk, residential, motorway)One-way restrictionsFootpaths, tracks, pedestrian, rivers, railwaysParks, woodland, industrial areas, cemeteriesPOI (pubs, cash machines, post offices, post boxes, bus stops, toilets, supermarkets, restaurants, monuments, hotels, picnic sites, barriers, light houses, piers, sports centres, petrol stations, playgrounds, cinemas, car parks, universities, tourist information, etc etc etc
We need lots of people because we gather a lot of data.
It's not just basic street map data, it's landuse coloured areas of the map, and all sorts of Points Of Interest details.
We'll get a better feel for what kinds of things to add as we look at mapping later on.
OpenStreetMap data users
Individuals
Using OpenStreetMap
OSMAnd
MAPS.ME
How can I use this data ?
Data is stored as XML (open)
Convertible to: postGIS, SHP, geoJSON & more
OpenStreetMap Use Cases
Humanitarian OpenStreetMap Team (HOT)2010 Haiti Earthquake
2014 Ebola virus epidemic in West Africa
2015 Nepal earthquake
Ramani Huria, Dar Es Salaam
Etc...
hotosm.org
OpenStreetMap Ghana
Developing community of OSMers
To create FREE detailed and up to date maps
Join us:[email protected]
twitter.com/osmghana
facebook.com/openstreetmapghana
Getting started!
beamapper.comlearnosm.orgwiki.openstreetmap.orgmapgive.state.gov
Is that all?
No!
Thank You
Enock Seth NyamadorVolunteer Mapper / OpenData advocate / OSM [email protected]@Enock4seth