MapViewer Geocoder URL

Question

I was using Map viewer URL provided by Oracle. We use these following two URL's
Map viewer URL : http://elocation.oracle.com/mapviewer
Geocoder URL : http://elocation.oracle.com/geocoder/gcserver
Sometimes Map Viewer URL when tested , the connection says 'Specified URL Connection is not accessible'. Bcoz of this i could not able to display color theme on the map resulted in error saying Map Viewer URL not found.
so later from someones help i understood tat it is for DEMO purpose so i installed OC4J and deployed mapviewer.ear file. i could able to bring up the mapviewer which i deployed.
i have two doubts here.
1) Do i need to have any database/schema that has all themes ,styles and other related map data in order to use it for the color theme map in ADF geographic components?
2) what URL should i need to give for Geocoder URL?

Answer 1

I'm not sure I understood the question. The answer below is based on the following assumptions that what you want do is:
a) use ADF and ADF DVT components to develop your application.
b) use a geocoder to convert street address (e.g. 500 oracle pkwy, redwood city, ca 94065) to Longitude, Latitude coordinates in order to display them on a map
c) also show some color filled areas on a map where the areas, for example, are US States or US Counties.
The question is can you use the two URLs, specified above, for the DVT GeoMap component to do this?
Short answer: Yes.
The correct theme name which uses state abbreviations to identify a state is map_states_abbrv. (i.e. abbrv instead of abbrev).
I don't why it worked one day and then not the next. Quite possibly what occurred was a data update which removed the temporary theme name that existed.
A few points of note:
- If you persist the addresses in some (oracle) database it probably makes sense to store the Long/Lat values too.
- the geocoder at elocation oracle com only has reference data for USA, Canada, and Western Europe.
Now for the other questions. I'm assuming they are:
1) what does mvdemo dataset contain? Only US state and county boundaries, location of some cities, and linear extent of some interstate highways. It does not have the reference data required for address geocoding.
2) what does the Navteq sample dataset contain? See http://www.oracle.com/technetwork/database/options/spatial/downloads/partners/spatial-partners-data-087203.html
It has detailed street level data, and required reference tables for address geocoding, for San Francisco, CA only.
3) If I do get reference data for geocoding what will it contain and how will updates be reflected or used?
The reference, from Navteq at elast, contains street segments and valid address ranges and postal code, admin area info for those street segements. The Spatial geocoding algorithms use interpolation to determine the long/lat for a supplied address. If the reference data contains parcel level details (e.g Navteq Point Addresses or CoreLogic's ParcelPoint dataset) then it will simply lookup the address and long/lat. Any committed updates will be used in subsequent geocde queries/lookups.
4) "I will be using complete postal address to locate in the map,so i believe i dont need to have individual geocoder apps deployed in my system OC4J where as it will be used only when we need to associate spatial locations (longitude and latitude coordinates) with postal addresses.correct me if i am wrong in this ?"
A complete postal address has to be converted to longitude, latitude coordinates in order to display it on a map.
Hope this helps.