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:talk-gh@openstreetmap.org

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 Ghanakwadzo459@gmail.com@Enock4seth