Tips to share a leaflet map with multiple ROIs

Do you have a Leaflet map? Yes. Can you panned and and zoomed to a particular event or ROI in the map? Yes. Then, how can you share that map zoomed or centered with ROI/events to your webpage or email as a link? One of the answers may be set the zoom level and set view near the ROI.  Alright, what will you do if you have a map with multiple ROI/events? Do you make multiple maps with multiple zoom level and view? You can, but probably not a good idea to do that. 

The solution comes here, leaflet-hash.js, solves your needs, it is a JavaScript library written by Michael Lawrence Evans, which appends the URL hashes to web pages automatically and the hash changes with Leaflet map on drag or zoom. The hash consists of map zoom level and latitude/longitude of the center of map viewport, everything you need to share the map with focused ROI as link in following simple steps:

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Interactive Map of Freshwater Species

"Freshwater Ecoregions of the World, (FEOW) provides a new global bio-geographic regionalization of the Earth's freshwater biodiversity.  Covering virtually all freshwater habitats on Earth, this first-ever ecoregion map, together with associated species data, is a useful tool for underpinning global and regional conservation planning efforts, particularly to identify outstanding and imperiled freshwater systems; for serving as a logical framework for large-scale conservation strategies; and for providing a global-scale knowledge base for increasing freshwater biogeographic literacy."

"Over a decade of work and contributions by more than 200 leading conservation scientists have produced a first-ever comprehensive map and database of the diversity of life in the world’s freshwater ecosystems. The map and associated fish data – a collaborative project between World Wildlife Fund and The Nature Conservancy." 

For the fish lovers, the map is so cool.  Since you all like fish....you might find it just as cool too!!!  It is interactive, click on an ecoregion, it shows threats, species etc.  User is able to change transparency on the image to show terrain behind the ecoregion.  

http://www.feow.org/

Oh yeah, there is a complete article that went along with it... 

http://www.sciencedaily.com/releases/2008/05/080512153631.htm

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Interactive Map: Looking Earth from Moon and Sun

Earth and Moon Viewer, an Impressive site which shows orthographic views of the Earth and the Moon using a mosaic of various satellite imagery including a full-color image of the Earth by day and night, a topographical map of the Earth, up-to-date weather satellite imagery, or a composite image of cloud cover superimposed on a map of the Earth, a color composite which shows clouds, land and sea temperatures, and ice, or the global distribution of water vapor. You can view either a map of the Earth showing the day and night regions at this moment, or view the Earth from the Sun, the Moon, the night side of the Earth, above any location on the planet specified by latitude, longitude and altitude, from a satellite in Earth orbit, or above various cities around the globe.

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