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Question : SQL Server - can I run this VBscript to clean up GPS data
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Hi,
I have a GPS asp application that tracks trucks - I want to be able to work out when a truck is stopped so have used the code below on my ASP page that works out the distance between two lat/long points - this works fine.
I want to keep the SQL database in the background tidy and was wondering if I can implement this kind of code on a trigger within the database. The table I have as below end up containing a lot of zero movements as a truck is parked up and I don't want to store them all.
Ideally I want to run the script below to see if the truck has moved since the last time it polled - if not, then delete the record or don't add it to the db at all
this is the data from the database (normally all the the truck registrations are interspersed with each other. The system polls every minute to give a lat/long position.
ID TruckID Lat Long LocationDate
1574979 XY11ABC 55.83513224 -4.07418026 7/5/2010 8:22:53 AM
1574987 XY11ABC 55.83631566 -4.06571035 7/5/2010 8:23:56 AM
1574995 XY11ABC 55.83668057 -4.06582142 7/5/2010 8:24:59 AM
1575005 XY11ABC 55.83668052 -4.06582194 7/5/2010 8:26:02 AM
1575016 XY11ABC 55.83693195 -4.06581692 7/5/2010 8:27:05 AM
1575030 XY11ABC 55.83693303 -4.06581585 7/5/2010 8:28:08 AM
1575042 XY11ABC 55.83693189 -4.06581739 7/5/2010 8:29:25 AM
1575054 XY11ABC 55.83693144 -4.06581942 7/5/2010 8:30:28 AM
1575065 XY11ABC 55.83693061 -4.06581951 7/5/2010 8:31:31 AM
1575077 XY11ABC 55.83693093 -4.06581852 7/5/2010 8:32:34 AM
1575089 XY11ABC 55.83692971 -4.06581949 7/5/2010 8:33:37 AM
1575101 XY11ABC 55.83692967 -4.06581927 7/5/2010 8:34:40 AM
1575113 XY11ABC 55.83624991 -4.06572767 7/5/2010 8:35:43 AM
1575125 XY11ABC 55.8349177 -4.0744535 7/5/2010 8:36:46 AM
1575138 XY11ABC 55.84388632 -4.07185126 7/5/2010 8:37:49 AM
1575149 XY11ABC 55.84737055 -4.0695392 7/5/2010 8:38:52 AM
1575161 XY11ABC 55.85210767 -4.08723739 7/5/2010 8:39:55 AM
1575173 XY11ABC 55.86060313 -4.10380805 7/5/2010 8:40:58 AM
1575185 XY11ABC 55.86403085 -4.12406581 7/5/2010 8:42:02 AM
1575196 XY11ABC 55.86608214 -4.13157355 7/5/2010 8:43:05 AM
1575208 XY11ABC 55.86608162 -4.13157292 7/5/2010 8:44:08 AM
1575220 XY11ABC 55.86361596 -4.13831228 7/5/2010 8:45:11 AM
1575232 XY11ABC 55.86651528 -4.14260283 7/5/2010 8:46:13 AM
This is the data that I show on my Web Page
The number on the end is the distance between the last Lat/Long position
as you can see from 8:28 to 8:34 the truck hasn't moved and I don't need to record all those zeroes Just saving one instance would be fine. We have 40ish trucks and the database can end up with a million records over 2 or three months, a large %age of the entries will be zero values
XY11ABC 05/07/2010 08:22:53 51 A752, North Lanarkshire G71 5, UK 436
XY11ABC 05/07/2010 08:23:56 Tannochside Dr, North Lanarkshire G71 5, UK 544
XY11ABC 05/07/2010 08:24:59 Tannochside Dr, North Lanarkshire G71 5, UK 41
XY11ABC 05/07/2010 08:26:02 Tannochside Dr, North Lanarkshire G71 5, UK 0
XY11ABC 05/07/2010 08:27:05 Tannochside Dr, North Lanarkshire G71 5, UK 27
XY11ABC 05/07/2010 08:28:08 Tannochside Dr, North Lanarkshire G71 5, UK 0
XY11ABC 05/07/2010 08:29:25 Tannochside Dr, North Lanarkshire G71 5, UK 0
XY11ABC 05/07/2010 08:30:28 Tannochside Dr, North Lanarkshire G71 5, UK 0
XY11ABC 05/07/2010 08:31:31 Tannochside Dr, North Lanarkshire G71 5, UK 0
XY11ABC 05/07/2010 08:32:34 Tannochside Dr, North Lanarkshire G71 5, UK 0
XY11ABC 05/07/2010 08:33:37 Tannochside Dr, North Lanarkshire G71 5, UK 0
XY11ABC 05/07/2010 08:34:40 Tannochside Dr, North Lanarkshire G71 5, UK 0
XY11ABC 05/07/2010 08:35:43 Tannochside Dr, North Lanarkshire G71 5, UK 75
XY11ABC 05/07/2010 08:36:46 A752, North Lanarkshire G71 5, UK 563
XY11ABC 05/07/2010 08:37:49 62 Roseneath Dr, North Lanarkshire G69 7, UK 1008
XY11ABC 05/07/2010 08:38:52 Dunnachie Drive, North Lanarkshire ML5 5, UK 412
XY11ABC 05/07/2010 08:39:55 Mainhill Rd, Bargeddie, North Lanarkshire G69 7, UK 1221
XY11ABC 05/07/2010 08:40:58 M8, Glasgow City G69 6, UK 1398
XY11ABC 05/07/2010 08:42:02 Easterhouse, Ware Road (N-bound), Glasgow, Glasgow City G34 9, UK 1318
XY11ABC 05/07/2010 08:43:05 Baldoven Crescent, Glasgow, Glasgow City G33 4, UK 520
XY11ABC 05/07/2010 08:44:08 Baldoven Crescent, Glasgow, Glasgow City G33 4, UK 0
XY11ABC 05/07/2010 08:45:11 Wellhouse Primary School, Glasgow, Glasgow City G33 4, UK 501
XY11ABC 05/07/2010 08:46:13 Easterhouse, Easter Queenslie Road (NE-bound), Glasgow, Glasgow City G33 4, UK 418
this is the code I use to work out the distance between the 2 points
<%
lat1 = (Recordset1.Fields.Item("Latitude").Value)
lon1 = (Recordset1.Fields.Item("Longitude").Value)
if (testloop > 0) then
dim R, dLat, dLon, a, c, d
' Gives distance in meters between 2 points
latlong = Sqr(((111 * (lat2 - lat1)) * (111 * (lat2 - lat1))) + (111 * (lon2 - lon1) * Cos(lat1 / 57.3)) * (111 * (lon2 - lon1) * Cos(lat1 / 57.3))) * 1000
SebDistance = latlong
end if
%>
lat2 and lon2 are set at the end of the overall while loop
Is it possible for me to build this into the database either as a trigger or a scheduled task to clean up the data - ie - if there are 2 or more zero movements, delete all but the first.
Thanks
Seb
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Answer : SQL Server - can I run this VBscript to clean up GPS data
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The syntax looks okay.
Is "text" underlined? It sounds like you are seeing the column heading only, but not the text of the source.
Try entering the name in upper case:
select text from user_source where name = 'DATAINSERT'
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