G'day all,
I have a similar problem to this, but slightly more basic, and
slightly more outdated!
I have a MS SQL table with investigations in, and the latitude and
longitude of said investigations. I wanted to be able to make a map,
using OGR / ODBC to connect to MS SQL, and display the points classed
by the level of investigation.
I created the OGR connection :
<OGRVRTDataSource>
<OGRVRTLayer name='mmapdata'>
<SrcDataSource>ODBC:mmap/[EMAIL PROTECTED]</SrcDataSource>
<SrcSQL>select rep.id, rep.latitude as latitude,
rep.longitude as longitude, upper(left(rlu1.lookupfull,1))
+substring(rlu1.lookupfull,2,len(rlu1.lookupfull)) as response from
reports rep join results res1 on (res1.reportid = rep.id and
res1.resulttypeid = 17 and res1.del=0) join resultlookup rlu1 on
(rlu1.resulttypesid = 17 and rlu1.id = res1.resultvalue) where
projectid = 30</SrcSQL>
<GeometryType>wkbPoint</GeometryType>
<GeometryField encoding='PointFromColumns' x='longitude'
y='latitude'/>
</OGRVRTLayer>
</OGRVRTDataSource>
and tested it :
C:\Documents and Settings\Administrator>C:\ms4w\tools\gdal-ogr\ogrinfo
C:\ms4w\Apache\htdocs\mmap\mapserver\xot1.ovf -ro -al
INFO: Open of `C:\ms4w\Apache\htdocs\mmap\mapserver\xot1.ovf'
using driver `VRT' successful.
Layer name: mmapdata
Geometry: Point
Feature Count: 1978
Extent: (0.000000, -43.173000) - (153.570000, 0.000000)
Layer SRS WKT:
(unknown)
id: Integer (10.0)
latitude: String (7.0)
longitude: String (7.0)
response: String (256.0)
OGRFeature(mmapdata):0
id (Integer) = 8887
latitude (String) = -34.922
longitude (String) = 138.599
response (String) = Specimens sent to the Laboratory
POINT (138.59899999999999 -34.921999999999997 0)
OGRFeature(mmapdata):1
id (Integer) = 10128
latitude (String) = -18.280
longitude (String) = 143.530
response (String) = Specimens sent to the Laboratory
POINT (143.53 -18.28 0)
OGRFeature(mmapdata):2
id (Integer) = 10129
latitude (String) = -16.920
longitude (String) = 145.770
response (String) = Investigation
POINT (145.77000000000001 -16.920000000000002 0)
So far, so good.
Then I built it into a map file :
MAP
EXTENT 110 -45 160 -8
FONTSET "/ms4w/Apache/htdocs/mmap/mapserver//fonts/fontset.txt"
IMAGECOLOR 203 230 255
IMAGETYPE gif
SYMBOLSET "/ms4w/Apache/htdocs/mmap/mapserver//symbols/colour.sym"
SHAPEPATH "C:\ms4w\Apache\htdocs\mmap\mapserver"
SIZE 600 600
STATUS ON
UNITS DD
NAME "basemap"
OUTPUTFORMAT
NAME "gif"
MIMETYPE "image/gif"
DRIVER "gd/gif"
EXTENSION "gif"
IMAGEMODE "PC256"
TRANSPARENT FALSE
END
LEGEND
IMAGECOLOR 255 255 255
KEYSIZE 20 8
KEYSPACING 5 4
LABEL
ANGLE 0.000000
ANTIALIAS TRUE
FONT "lucida"
MAXSIZE 256
MINSIZE 4
SIZE 7
TYPE TRUETYPE
BUFFER 2
COLOR 0 0 0
FORCE FALSE
MINDISTANCE -1
MINFEATURESIZE -1
OFFSET 0 0
OUTLINECOLOR 255 255 250
PARTIALS TRUE
POSITION UR
SHADOWCOLOR 250 250 250
SHADOWSIZE 2 2
END
POSITION LL
STATUS EMBED
TRANSPARENT TRUE
END
LAYER
DATA "ausregion"
GROUP "Australia"
METADATA
END
NAME "ausregionlayer"
SIZEUNITS DD
STATUS DEFAULT
TOLERANCEUNITS PIXELS
TYPE POLYGON
UNITS METERS
CLASS
METADATA
END
STYLE
ANGLE 360
COLOR 245 245 220
SYMBOL 0
END
END
END
LAYER
CONNECTION "<OGRVRTDataSource>
<OGRVRTLayer name='mmapdata'>
<SrcDataSource>ODBC:mmap/[EMAIL PROTECTED]</SrcDataSource>
<SrcSQL>select rep.latitude as latitude, rep.longitude as
longitude, upper(left(rlu1.lookupfull,1))+substring(rlu1.lookupfull,
2,len(rlu1.lookupfull)) as response from reports rep join results
res1 on (res1.reportid = rep.id and res1.resulttypeid = 17 and
res1.del=0) join resultlookup rlu1 on (rlu1.resulttypesid = 17 and
rlu1.id = res1.resultvalue) where projectid = 30</SrcSQL>
<GeometryType>wkbPoint</GeometryType>
<GeometryField encoding='PointFromColumns' x='longitude'
y='latitude'/>
</OGRVRTLayer>
</OGRVRTDataSource>"
CONNECTIONTYPE OGR
DATA "mmapdata"
CLASSITEM response
METADATA
END
NAME ".xot1"
SIZEUNITS PIXELS
STATUS DEFAULT
TOLERANCEUNITS PIXELS
TYPE POINT
UNITS METERS
CLASS
NAME "Field investigation"
EXPRESSION "investigation"
LABEL
SIZE MEDIUM
TYPE BITMAP
BUFFER 0
COLOR 0 0 0
FORCE FALSE
MINDISTANCE -1
MINFEATURESIZE -1
OFFSET 0 0
PARTIALS FALSE
POSITION AUTO
END
METADATA
END
STYLE
ANGLE 360
COLOR 166 206 227
SIZE 10
SYMBOL 1
END
END
etc
and try :
C:\Documents and Settings\Administrator>c:\ms4w\tools\mapserv
\shp2img.exe -m C:\ms4w\Apache\htdocs\nahis\mapserver\tmp
\NAHISdf7c8a22c2b16b33730aa228fac405bb.map
-l .xot1 -o C:\test.gif
scalefactor = 12
and I get the map with the borders etc, but no points (the legend show
up OK). Even if I remove the classitem and expressions, I still don't
get any points.
My two questions therefore are :
1. How can I find if I am truly getting no points at all, or they are
not displaying.
2. How do I set up expressions to specify that the third column in my
sql statement (response) is the classitem and to class based on it.
The catch here is that to maintain compatibility with the rest of the
system, I am using ms4w 1.5.5
cheers
Ben
--
Ben Madin
REMOTE INFORMATION
t : +61 8 9192 5455
f : +61 8 9192 5535
m : 0448 887 220
Broome WA 6725
[EMAIL PROTECTED]
Out here, it pays to
know...
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