w w w. n e s s t a r. c o m Madiera Georeferences - extending search for data Ørnulf Risnes

w w w. n e s s t a r. c o m A Geo-referencing system Current problems with the DDI –Difficult to use geographic references in a consistent manner –Difficult to use geographic references for something useful

w w w. n e s s t a r. c o m What do we need? “We need a geographic identification of data resources” –Associate studies with geographic coordinates “A coordinate-aware interface that can support the searching process” –Search for studies using geographic coordinates

w w w. n e s s t a r. c o m Getting geographic coordinates into studies Potentially large amounts of coordinate data Tagging process should be mostly automatic Fortunately,the DDI 2.0 has room for our coordinates! Norway

w w w. n e s s t a r. c o m Geographic tagging using Nesstar Publisher Nesstar Publisher can talk to a standard openGIS map-server (WFS) Web Feature Server Publisher Nesstar Server Select coordinates from list of available maps Publish dataset with coordinates

w w w. n e s s t a r. c o m Geographic tagging using Nesstar Publisher Publisher-user specifies map and subregions Dataset/ DDI

w w w. n e s s t a r. c o m Geographic tagging using Nesstar Publisher DDI with geographic coordinates is published to a Nesstar-server … … Nesstar Server Now, the coordinates “live” on the server and can be utilised in a search procedure

w w w. n e s s t a r. c o m Geographic searching in the Madiera Portal The best way to select area of interest? –Search for name of country or region? –Using a map-interface? It depends on the situation… …but today we demonstrate a map-based search interface

w w w. n e s s t a r. c o m Map-search requirements The user must be able to: Select map from a list of relevant maps Zoom into an area of interest Submit the coordinates of the area of interest as a parameter of a search query Allow for combination of area of interest and additional parameters (i.e. text-based search)

w w w. n e s s t a r. c o m Map-search-interface …can be plugged into the Portal or any Nesstar Server …talks to a standard openGIS map-server (WMS) Nesstar Server/ Madiera Portal Map interface Web Map Server

w w w. n e s s t a r. c o m Map-search-component …lets the user choose maps from a list of available maps …renders map image from the coordinates

w w w. n e s s t a r. c o m Map-search-component …supports zoom and pan Demo: