Nominatim GeoCoder Developer

Needed Files

Include in buildjs these files:

• gxp/src/script/widgets/NominatimGeocoderComboBox.js
• gxp/src/script/plugins/NominatimGeocoder.js

Configuration Example

{
"ptype":"gxp_nominatimgeocoder",
"outputConfig":{
	"emptyText":"Nominatim GeoCoder",
	 "vendorOptions":{
		"bounded":1,
		"countrycodes":"it",
		"addressdetails":0
	},
    "boundOption":"max"
},
"outputTarget":"paneltbar",
"index":26
}

• ptype: ptype of the plugin
• outputConfig: specific configuration for the NominatimGeoCoderComboBox widget
  • emptyText text to show when the search field is empty
  • vendorOptions : options for the Nominatim request
    • bounded: (0|1) limits the search to the viewbox (default 0).
      • 0: the viewbox is used as "favorite area", so first results are in this area
      • 1: the viewbox is used to limit result. Out of this area there's not any result.
    • countrycodes: a list of countrycodes to limit search results (default empty)
    • addressdetails: (0|1) to get additional details in results (not managed in UI,default to 0)
    • polygon: (0|1) get geometry (not managed in UI,default to 0)
  • boundOption:(String) Options to set viewbox parameter(default to "max"). Allowed values are:
    • max : search in map max extent
    • current: search in current extent
    • config: gets the passed bounds option in geographic coordinates
  • bounds (Object - {left:"...",top:"...",right:"...",bottom:"..."}) if _viewbox _if boundOption is set to "config"
• outputTarget: plugin target (plugin general configuration)
• index: index in target (plugin general configuration)

Known issues and solutions

The nominatim plugin for not included projections can use proj4js lib. Some projections definition could not have correction parameters for transformation from/to EPSG:4326, so they have to be set manually. The corrective parameter is +towgs84 MapStore allow to override Proj4js definitions (see this configuration ).

###Exemple:

EPSG:3003 (Monte Mario / Italy zone 1) definition don't include these parameters. this may cause a shift of a hundred meters. For Peninsular zone configuration the additional configuration is:

    "proj4jsDefs":{
        "EPSG:3003":"+proj=tmerc +lat_0=0 +lon_0=9 +k=0.9996 +x_0=1500000 +y_0=0 +ellps=intl +units=m +towgs84=-104.1,-49.1,-9.9,0.971,-2.917,0.714,-11.68 +no_defs"

},

####Correction Parameters for EPSG:3003

Reference

+towgs84=-104.1,-49.1,-9.9,0.971,-2.917,0.714,-11.68	Italy (Peninsular Part), Accuracy 3-4m
+towgs84=-168.6,-34.0,38.6,-0.374,-0.679,-1.379,-9.48	Italy (Sardinia), Accuracy 3-4m
+towgs84=-50.2,-50.4,84.8,-0.690,-2.012,0.459,-28.08	Italy (Sicily), Accuracy 3-4m