Directions Route

Get step-by-step driving instructions from the MapQuest Directions API using SQL Server.

Prerequisites:

See SQLHTTP easy setup for MapQuest API
See API Call documentation for parameter values and other information
Create the stored procedure documented below

Stored Procedure:


CREATE PROCEDURE usp_MapQuest_Directions_Route(	@From varchar(100),
						@To varchar(100),
						@Response nvarchar(MAX) OUTPUT,
						@StatusCode int OUTPUT,
						@StatusDescription nvarchar(MAX) OUTPUT)
AS

DECLARE @URL nvarchar(MAX) 
DECLARE @QueryString varchar(MAX)
DECLARE @HTTPSessionID uniqueidentifier

SET @URL = 'http://www.mapquestapi.com/directions/v2/route'

EXEC SQLHTTP.net.QueryStringBuilder     @QueryString OUTPUT,
					'MapQuest', 
					'key', '#APIKey',
					'from', @From,
					'to',@To

SET @URL = @URL + @QueryString;
				
EXEC SQLHTTP.net.HTTPSession @HTTPSessionID OUTPUT

EXEC SQLHTTP.net.HTTPRequest    @HttpSessionID,
                                @URL = @URL,
                                @Method = 'GET',
                                @StatusCode = @StatusCode OUTPUT,
                                @StatusDescription = @StatusDescription OUTPUT,
                                @Response = @Response OUTPUT
GO

CREATE PROCEDURE usp_MapQuest_Directions_Route( @From varchar(100),

@To varchar(100),

@Response nvarchar(MAX) OUTPUT,

@StatusCode int OUTPUT,

@StatusDescription nvarchar(MAX) OUTPUT)

DECLARE @URL nvarchar(MAX)

DECLARE @QueryString varchar(MAX)

DECLARE @HTTPSessionID uniqueidentifier

SET @URL = 'http://www.mapquestapi.com/directions/v2/route'

EXEC SQLHTTP.net.QueryStringBuilder @QueryString OUTPUT,

'MapQuest',

'key', '#APIKey',

'from', @From,

'to',@To

SET @URL = @URL + @QueryString;

EXEC SQLHTTP.net.HTTPSession @HTTPSessionID OUTPUT

EXEC SQLHTTP.net.HTTPRequest @HttpSessionID,

@URL = @URL,

@Method = 'GET',

@StatusCode = @StatusCode OUTPUT,

@StatusDescription = @StatusDescription OUTPUT,

@Response = @Response OUTPUT

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Sample Usage:


DECLARE @Response nvarchar(MAX)
DECLARE @StatusCode int
DECLARE @StatusDescription nvarchar(MAX)

EXEC usp_MapQuest_Directions_Route	@From = '100 Mt Diablo Blvd, Walnut Creek, California',
					@To = '3200 Telegraph Ave, Berkeley',
					@Response = @Response OUTPUT, 
					@StatusCode = @StatusCode OUTPUT, 
					@StatusDescription = @StatusDescription OUTPUT

IF @StatusCode >= 400
	EXEC SQLHTTP.net.RaiseHttpError @StatusCode, @StatusDescription, @Response
ELSE
	BEGIN
		EXEC SQLHTTP.net.Json_To_GlobalTable @Response, 'MapQuestAPITempGlobalTable'

		SELECT	maneuvers_index, 
			startPoint_lat, 
			startPoint_lng, 
			maneuvers_mapUrl,
			maneuvers_narrative
		FROM ##MapQuestAPITempGlobalTable
		WHERE startPoint_lat IS NOT NULL
		ORDER BY maneuvers_index

		DROP TABLE ##MapQuestAPITempGlobalTable
	END

DECLARE @Response nvarchar(MAX)

DECLARE @StatusCode int

DECLARE @StatusDescription nvarchar(MAX)

EXEC usp_MapQuest_Directions_Route @From = '100 Mt Diablo Blvd, Walnut Creek, California',

@To = '3200 Telegraph Ave, Berkeley',

@Response = @Response OUTPUT,

@StatusCode = @StatusCode OUTPUT,

@StatusDescription = @StatusDescription OUTPUT

IF @StatusCode >= 400

EXEC SQLHTTP.net.RaiseHttpError @StatusCode, @StatusDescription, @Response

ELSE

BEGIN

EXEC SQLHTTP.net.Json_To_GlobalTable @Response, 'MapQuestAPITempGlobalTable'

SELECT maneuvers_index,

startPoint_lat,

startPoint_lng,

maneuvers_mapUrl,

maneuvers_narrative

FROM ##MapQuestAPITempGlobalTable

WHERE startPoint_lat IS NOT NULL

ORDER BY maneuvers_index

DROP TABLE ##MapQuestAPITempGlobalTable

END

maneuvers_index startPoint_lat startPoint_lng maneuvers_mapUrl maneuvers_narrative

------------------ ------------------- ---------------- ----------------------- ------------------------------------------------------------------------

0 37.898929 -122.056175 http://www.mapquest... Start out going southwest on Mt Diablo Blvd toward Iron Horse Trl.

1 37.896583 -122.071571 http://www.mapquest... Merge onto CA-24 W.

2 37.843555 -122.254959 http://www.mapquest... Take the Telegraph Avenue exit, EXIT 3.

3 37.841785 -122.261611 http://www.mapquest... Turn right onto Telegraph Ave.

4 37.852821 -122.260147 http://www.mapquest... Make a U-turn at Woolsey St onto Telegraph Ave.

5 37.852943 -122.260177 http://www.mapquest... 3200 TELEGRAPH AVE is on the right.

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USERS SHALL BE SOLELY RESPONSIBLE AND BE SOLELY LIABLE FOR VIOLATION OF ANY RULES SPECIFIED BY THIRD PARTIES FOR USING THEIR WEBSITES AND/OR APIs, OR INFRINGEMENT OF RIGHTS OF SUCH THIRD PARTIES.