Introduction to Geo Technologies
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Introduction to Geo Technologies

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An introduction to all the geo technologies provided by Yahoo and how to use them to solve common geo problems.

An introduction to all the geo technologies provided by Yahoo and how to use them to solve common geo problems.

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    Introduction to Geo Technologies Introduction to Geo Technologies Presentation Transcript

    • Yahoo Geo Technologies Things you might not know about. Chris&an Heilmann, Tech Talk ‐ Sunnyvale, Ca,  8/4/2010
    • Geolocation is the new thing.
    • It is also big business.
    • Yahoo has amazing geo technology products.
    • And they work localised to outside the US.
    • Problem is that geo is hard-core Math.
    • There are a few different ingredients to playing with geo location.
    • Finding the current location.
    • Finding the current location. Turning a location into a place.
    • Finding the current location. Turning a location into a place. Finding a geographical hierarchy.
    • Finding the current location. Turning a location into a place. Finding a geographical hierarchy. Geo-tagging information.
    • Finding the current location. Turning a location into a place. Finding a geographical hierarchy. Geo-tagging information. Displaying geo information.
    • Finding the current location. Finding the current location happens in different ways.
    • Finding the current location. sniffing. The creepy way - IP
    • Finding the current location.
    • Finding the current location. h=p://isithackday.com/hacks/geo/js‐loca&on.html
    • Finding the current location. The problem with IP sniffing is accuracy.
    • Finding the current location. The other problem: it is not reliable.
    • Finding the current location. The non-creepy and more accurate way - the W3C geolocation API.
    • Finding the current location. Firefox/(Mobile) Safari/Chrome (dev build)
    • Finding the current location. Another way is of course to get location information from the user’s social presence.
    • Finding the current location. Plazes, FireEagle, Twitter, Yahoo, Flickr, Foursquare, Gowalla, Brightkite, Google Buzz/ Latitude, Dopplr...
    • Problem: none of this works in YAP applications.
    • Problem: none of this works in YAP applications.
    • Turning a location into a place. Having a latitude and longitude is fine and dandy but it is ambiguous.
    • Turning a location into a place. The same lat/lon pair could be a lot of things - the centre of a town, a point of interest...
    • Turning a location into a place. This is why we need to turn lat/lon into something that is human readable.
    • Turning a location into a place. This is called reverse geocoding and there are a few services for it out there.
    • Turning a location into a place. My personal favourite (as it works world-wide) is the Flickr reverse geocoder.
    • Turning a location into a place. h=p://www.flickr.com/services/api/flickr.places.findByLatLon.html
    • Turning a location into a place. You can use this using YQL: select * from flickr.places where lat=51.5142271 and lon=‐0.1289602
    • Turning a location into a place. To get more in- depth data, use flickr and Yahoo Geo: select * from geo.places where woeid in (   select place.woeid from flickr.places    where lat=51.5142271 and lon=‐0.1289602 )
    • Turning a location into a place.
    • Turning a location into a place.
    • Turning a location into a place. Whoa!!! WOEID
    • Finding a geographical hierarchy. What’s around a certain location? h=p://developer.yahoo.com/geo/
    • Turning a location into a place. GeoPlanet gives you hierarchies: Parent, Ancestors, Children, Siblings, Neigbours, BelongTos.
    • Finding a geographical hierarchy. h=p://isithackday.com/geoplanet‐explorer/?woeid=615702
    • Finding a geographical hierarchy. h=p://isithackday.com/geoplanet‐explorer/geodrilldown.php
    • Finding a geographical hierarchy.
    • Finding the current location. Putting it all together, we can get this: h=p://isithackday.com/hacks/geo/geotest.php
    • What if you have no location but only a Geo-tagging information. resource?
    • Geo-tagging information. h=p://developer.yahoo.com/geo/placemaker/
    • Placemaker takes a text, or a web URL Geo-tagging information. and extracts the geographical information from it.
    • select * from  Geo-tagging information. geo.placemaker where  documentContent = "Hey I  am in Atlanta! I came here  from London and will  travel onwards to Las  Vegas and Sao Paulo" and  documentType="text/ plain"
    • select * from geo.placemaker where  Geo-tagging information. documentURL = "h=p://icant.co.uk" and documentType="text/ html" and appid="" select * from geo.placemaker where  documentURL = "h=p://newsrss.bbc.co.uk/rss/ newsonline_uk_edi&on/front_page/rss.xml" and documentType="text/rss" and appid=""
    • Placemaker returns places and Geo-tagging information. references - you can use these to enhance texts with geo information.
    • To see Placemaker in action, check out Geo-tagging information. the GeoMaker hack. h=p://github.com/codepo8/geomaker
    • Geo-tagging information. h=p://icant.co.uk/geomaker/
    • Geo-tagging information.
    • Geo-tagging information. Geonames ID ISO FIPS INSEE JGDC IATA ICAO WOEID
    • Geo-tagging information. Concordance
    • Geo-tagging information. http://isithackday.com/hacks/geo/geosetta.php
    • Displaying geo Displaying geo information. information is done via Map APIs
    • By far the easiest Displaying geo information. way to build a very simple map is to use the Google static maps API.
    • <img src=”h=p://maps.google.com/maps/api/ sta&cmap? Displaying geo information. sensor=false &size=200x200 &maptype=roadmap &key=YOUR_MAP_KEY &markers=color:blue|label:1|37.4447,‐122.161 &markers=color:blue|label:2|37.3385,‐121.886 &markers=color:blue|label:3|37.3716,‐122.038 &markers=color:blue|label:4|37.7792,‐122.42”  alt=””>
    • If you want to use Displaying geo information. Yahoo Maps with the data returned from the earlier YQL calls here’s the code:
    • Displaying geo information.
    • Displaying geo information.
    • If you want to use Displaying geo information. any map provider easily without deep-diving into an API, use Mapstraction.
    • Displaying geo information. h=p://www.mapstrac&on.com/
    • Putting it all together... Summa summarum http://isithackday.com/hacks/geo/yql-geo-library/
    • And the hacking continues... h=p://delicious.com/tag/geotoys
    •  Chris&an Heilmann  h=p://wait‐&ll‐i.com  Cheers  h=p://developer‐evangelism.com  h=p://twi=er.com/codepo8