Wednesday 22nd May, 2013
11:30am to 12:00pm
National Weather Service (NWS) field offices, working in collaboration with the National Centers for Environmental Prediction (NCEP), feed data into the National Digital Forecast Database (NDFD) to produce a seamless mosaic of digital forecasts. Data from NDFD is available to the public in raw format as well as web-based displays. Currently, the public display provides only static images with minimal user-interaction, i.e. no pan/zoom or data probe capabilities. In addition, the images are created for different sectors of the United States, each containing hundreds of static images. The need for custom sectors requires hundreds more static images, often overlapping pieces of existing sectors.
In order to overcome these limitations, a development team at the NWS Meteorological Development Laboratory (MDL) has created an updated version of the web-based NDFD data display by combining several Open Source software packages: OpenLayers, ExtJS/GeoExt, MapServer, jQuery, PostgreSQL/PostGIS, and GDAL. The updated display dramatically reduces the number of images needed per United States region (resulting in a pre-processing time savings) and increases user interactive capabilities with the data as well via a map window on the web page. The updated display was recently released on an experimental basis to the general public for comment.
National Weather Service
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