Thursday, March 3, 2016

Esri Leaflet Dynamic TileLayer Plugin Example

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While working in one my Esri-Leaflet based application, I am stumbled on rendering dynamic map layers on tiled basis. Esri leaflet-api does the perfect job on non-tiled layer display but L.esri.DynamicMapLayer, doesn’t provide the tiled dynamic map layers. Looking around I came across the Tiled dynamic layer plugin for esri-leaflet, for displaying the DynamicMapLayer in tiled mode.

Here I have created both non-tiled and tiled DynamicMapLayer version for comparison using plain esri-leaflet and esri-leaflet with plugin.

Thursday, February 7, 2013

Interactive Map of Freshwater Species

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"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 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.  

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

Thursday, November 17, 2011

How to retrieve WMS GetFeatureInfo from Openlayers & Geoserver

Be The First To Comment'click', map, function (e) {
    var url = layerhost
      + "?REQUEST=GetFeatureInfo"
      + "&EXCEPTIONS=application/vnd.ogc.se_xml"
      + "&BBOX=" + map.getExtent().toBBOX()
      + "&X=" + x1
      + "&Y=" + y1
      + "&INFO_FORMAT=text/html"
      + "&QUERY_LAYERS=" + layername
      + "&LAYERS="+layername
      + "&FEATURE_COUNT=50"
      + "&SRS=EPSG:900913"
      + "&STYLES="
      + "&WIDTH=" + map.size.w
      + "&HEIGHT=" + map.size.h;,

I got  X and Y points due to floating point error while retrieving GetFeatureInfo . In order to prevent those errors I parse e.xy.x and e.xy.y values into integer, and it works for me.

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