Projections
Bradley Mclain
bradleym06 at HOTMAIL.COM
Tue Feb 6 17:21:41 EST 2007
I have found that with my raster image I also have a .tfw, .rrd and a .aux.
I know that the .tfw is a world file, how exactly do I use this to correctly
align the image?
Any ideas on what the other files do?
.tfw contains:
0.609681177000000020
0.0
0.0
-0.609608973000000050
418598.64283825672
6209013.2277570702
Brad
>From: "Simpson" <drewsimpson at bellsouth.net>
>To: "Bradley Mclain" <bradleym06 at HOTMAIL.COM>
>Subject: RE: [UMN_MAPSERVER-USERS] Projections
>Date: Fri, 2 Feb 2007 08:10:57 -0600
>
>20255 and 20355 should have made a difference, maybe worse?
>Do you have only three datasources to render, or once these are perfected,
>you have many more to do?
>If only these, a low budget/brute force approach would be to strip any
>geotif tags from the raster and use a world file
>(http://en.wikipedia.org/wiki/World_file), which is easily adjustable to
>align with your vector datasources. To strip tags, use a non-geo aware
>utility like tiffcp to create a new raster.
>
>-----Original Message-----
>From: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU]On
>Behalf Of Bradley Mclain
>Sent: Thursday, February 01, 2007 4:19 PM
>To: MAPSERVER-USERS at LISTS.UMN.EDU
>Subject: Re: [UMN_MAPSERVER-USERS] Projections
>
>
>Drew
>
>Sorry for late reply, I tried both and unfortunately no luck.
>
>have you got any other ideas on how to fix this? I am attaching the current
>version my mapfile and html template so you can have a look.
>
>Also I have some other little questions:
>1. At the moment my map starts up and it is not until you click on the map
>or use the zoom functions etc that the map shows. Before that it is a blank
>image. Is there anyway to make the image show up on page load?
>
>2. As you can see from the attached file, my layer selections are currently
>split into two locations (Bibul and Hemley), is there anyway to make it so
>that both the Bilbul and Hemley data for the respective data show up using
>the one checkbox and display as one symbol in the legend. (eg instead of
>"Bilbul Property Boundary" and "Hemley Property Boundary", just have a
>single checkbox and legend label called "Property Boundaries". The data for
>each location is in seperate shapefiles and hence seperate layers within
>the
>mapfile.
>
>3. How do I add buttons to the edge of my map which allow simple panning,
>or
>is it possible to add smooth panning such as google maps as this would be
>preferable (I have read this needs ka-map and ajax style technology).
>
>Thanks for the help so far
>
>Brad
>
>
>
>
>
>
> >From: "Simpson" <drewsimpson at bellsouth.net>
> >To: "Bradley Mclain"
> ><bradleym06 at HOTMAIL.COM>,<MAPSERVER-USERS at LISTS.UMN.EDU>
> >Subject: RE: [UMN_MAPSERVER-USERS] Projections
> >Date: Thu, 1 Feb 2007 07:08:15 -0600
> >
> >Brad,
> >
> >A Clarification, did you try epsg 20255 and 20355 for the raster, leaving
> >vector at 28355?
> >
> >Drew.
> >
> >-----Original Message-----
> >From: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU]On
> >Behalf Of Bradley Mclain
> >Sent: Wednesday, January 31, 2007 8:00 PM
> >To: MAPSERVER-USERS at LISTS.UMN.EDU
> >Subject: Re: [UMN_MAPSERVER-USERS] Projections
> >
> >
> >Hi Jérôme
> >
> >I tried what you said but still no luck, I tried several combinations,
>like
> >only for raster, only for polygons, and everything together including
> >defining in the mapfile. The map still shows but it is still off centre.
> >
> >I attached the mapfile and a pic of the problem to give you a better
>idea.
> >
> >I talked to someone before about this and they said the problem was
> >something to do with the fact the shapfile data takes into account the
> >spherical nature of the globe while the raster image does not.
> >
> >Brad
> >
> >
> >
> >
> > >From: Jérôme Martin <gooogle at FREE.FR>
> > >Reply-To: Jérôme Martin <gooogle at FREE.FR>
> > >To: MAPSERVER-USERS at LISTS.UMN.EDU
> > >Subject: Re: [UMN_MAPSERVER-USERS] Projections
> > >Date: Thu, 1 Feb 2007 02:23:35 +0100
> > >
> > >Hi Bradley,
> > >
> > >it is normal if your raster is not correctly aligned with the 2 goods
> > >shapefiles.
> > >
> > >In fact, yours shapefiles are on the projection "GDA_1994_MGA_Zone_55",
> >so
> > >its implique mapserv knows where to place correctly the shapefiles
>data.
> > >But for your raster, you don't have any information about the
>projection.
> > >So it can't know in what projection and zone the data has to be. (a
> > >bounding box exist in each zone, and are just translated from 6° (maybe
> >not
> > >in your reprojection, i don't know it, but UTM is the same system of
>2x60
> > >zones to define the earth)).
> > >
> > >So you can first try to put for each layer in your mapfile
> > >
> > >PROJECTION
> > > "init=epsg:xxxx" #where xxxx is the corresponding identifier of
> >the
> > >projection (check the share/proj/epsg file to do this) : in your case,
>it
> > >is "init=epsg:28355".
> > >END
> > >
> > >to force mapserv to know from where the data comes. It is probably
>useful
> > >only for the raster, but try to put again for shapefile in case of it
> >still
> > >doesn't work. (It always better to add this information in each layer)
> > >
> > >I hope i could help you,
> > >
> > >sincerely,
> > >
> > >Jérôme
> > >
> > >Bradley Mclain a écrit :
> > >>Hi
> > >>
> > >>I'm having some problems with projections in Mapserver. I have three
> > >>pieces of data, 2 polygon shapefiles and a GeoTIFF raster image. I am
> > >>trying to define their projections so that they align correctly as the
> > >>raster is slightly off from the two shapefiles.
> > >>
> > >>I have managed to extract the geographical info from the files but I
> >have
> > >>no idea where I define it in the mapfile and what info I need to
>include
> > >>(or what any of it means).
> > >>
> > >>I have attached the three text files which include the geographical
>data
> > >>for each, can someone explain to me how to define these in a mapfile,
>eg
> > >>where I need to do it and what info I need.
> > >>
> > >>Can you please include lots of detail and description so I can fully
> > >>understand :)
> > >>
> > >>Thanks
> > >>
> > >>Brad
> > >>
> > >>_________________________________________________________________
> > >>Advertisement: Fresh jobs daily. Stop waiting for the newspaper.
>Search
> > >>Now! www.seek.com.au
> >
> >>http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Fninemsn%2Eseek%2Ecom%2Eau&
> >_t=757263760&_r=Hotmail_EndText_Dec06&_m=EXT
> > >>
> > >>Layer name: DBW_Home_Bilbul_Cadastral_Boundary
> > >>Geometry: Polygon
> > >>Feature Count: 15
> > >>Extent: (419320.137222, 6205167.425465) - (421949.715102,
> >6207719.690811)
> > >>Layer SRS WKT:
> > >>PROJCS["GDA_1994_MGA_Zone_55",
> > >> GEOGCS["GCS_GDA_1994",
> > >> DATUM["Geocentric_Datum_of_Australia_1994",
> > >> SPHEROID["GRS_1980",6378137.0,298.257222101]],
> > >> PRIMEM["Greenwich",0.0],
> > >> UNIT["Degree",0.0174532925199433]],
> > >> PROJECTION["Transverse_Mercator"],
> > >> PARAMETER["False_Easting",500000.0],
> > >> PARAMETER["False_Northing",10000000.0],
> > >> PARAMETER["Central_Meridian",147.0],
> > >> PARAMETER["Scale_Factor",0.9996],
> > >> PARAMETER["Latitude_Of_Origin",0.0],
> > >> UNIT["Meter",1.0]]
> > >>LUID: Real (11.0)
> > >>PLANTYPE: String (4.0)
> > >>TAG: String (50.0)
> > >>Area: Real (19.11)
> > >>Perimeter: Real (19.11)
> > >>Acres: Real (19.11)
> > >>Hectares: Real (19.11)
> > >>Bound_type: String (25.0)
> > >>Prop_ID: String (30.0)
> > >>OGRFeature(DBW_Home_Bilbul_Cadastral_Boundary):0
> > >> LUID (Real) = 103663790
> > >> PLANTYPE (String) = 13
> > >> TAG (String) = 116//751728
> > >> Area (Real) = 206766.29741414590
> > >> Perimeter (Real) = 1930.52158953932
> > >> Acres (Real) = 51.09308655258
> > >> Hectares (Real) = 20.67662974141
> > >> Bound_type (String) = Cadastre
> > >> Prop_ID (String) = DBW_Home_Bilbul
> > >> POLYGON ((419849.019570303731598
> > >>6205435.040179193019867,419680.452153401391115
> > >>6205707.173638857901096,420228.545299204241019
> > >>6206046.107636354863644,420397.849921675398946
> > >>6205772.639121992513537,419849.019570303731598
>6205435.040179193019867))
> > >>
> > >>Layer name: DBW_Hemley_2593_Cadastral_Boundary
> > >>Geometry: Polygon
> > >>Feature Count: 3
> > >>Extent: (422645.120770, 6208302.281805) - (423450.690420,
> >6208880.746240)
> > >>Layer SRS WKT:
> > >>PROJCS["GDA_1994_MGA_Zone_55",
> > >> GEOGCS["GCS_GDA_1994",
> > >> DATUM["Geocentric_Datum_of_Australia_1994",
> > >> SPHEROID["GRS_1980",6378137.0,298.257222101]],
> > >> PRIMEM["Greenwich",0.0],
> > >> UNIT["Degree",0.0174532925199433]],
> > >> PROJECTION["Transverse_Mercator"],
> > >> PARAMETER["False_Easting",500000.0],
> > >> PARAMETER["False_Northing",10000000.0],
> > >> PARAMETER["Central_Meridian",147.0],
> > >> PARAMETER["Scale_Factor",0.9996],
> > >> PARAMETER["Latitude_Of_Origin",0.0],
> > >> UNIT["Meter",1.0]]
> > >>LUID: Real (11.0)
> > >>PLANTYPE: String (4.0)
> > >>TAG: String (50.0)
> > >>Area: Real (19.11)
> > >>Perimeter: Real (19.11)
> > >>Acres: Real (19.11)
> > >>Hectares: Real (19.11)
> > >>Bound_type: String (40.0)
> > >>Prop_ID: String (30.0)
> > >>OGRFeature(DBW_Hemley_2593_Cadastral_Boundary):0
> > >> LUID (Real) = 103664166
> > >> PLANTYPE (String) = 13
> > >> TAG (String) = 288//751728
> > >> Area (Real) = 73981.56105988749
> > >> Perimeter (Real) = 1173.94681513112
> > >> Acres (Real) = 18.28124965142
> > >> Hectares (Real) = 7.39815610599
> > >> Bound_type (String) = Cadastre
> > >> Prop_ID (String) = Hemley_2593
> > >> POLYGON ((423067.736698167922441
> > >>6208782.058439230546355,423228.702213083277456
> > >>6208880.746239688247442,423450.690419794409536
> > >>6208521.27053206320852,423266.332749532884918
> > >>6208468.748745977878571,423260.736078957444988
> > >>6208477.574468746781349,423067.736698167922441
>6208782.058439230546355))
> > >>
> > >>Driver: GTiff/GeoTIFF
> > >>Size is 9530, 6552
> > >>Coordinate System is `'
> > >>Origin = (418485.188000000023749,6208828.519999999552965)
> > >>Pixel Size = (0.609681177000000,-0.609608973000000)
> > >>Metadata:
> > >> AREA_OR_POINT=Area
> > >> TIFFTAG_SOFTWARE=IMAGINE TIFF Support
> > >>Copyright 1991 - 1999 by ERDAS, Inc. All Rights Reserved
> > >>@(#)$RCSfile: etif.c $ $Revision: 1.9.1.2 $ $Date: 2001/12/05
>00:33:12Z
> >$
> > >> TIFFTAG_XRESOLUTION=1
> > >> TIFFTAG_YRESOLUTION=1
> > >> TIFFTAG_RESOLUTIONUNIT=1 (unitless)
> > >>Corner Coordinates:
> > >>Upper Left ( 418485.188, 6208828.520)
> > >>Lower Left ( 418485.188, 6204834.362)
> > >>Upper Right ( 424295.450, 6208828.520)
> > >>Lower Right ( 424295.450, 6204834.362)
> > >>Center ( 421390.319, 6206831.441)
> > >>Band 1 Block=9530x1 Type=Byte, ColorInterp=Red
> > >>Band 2 Block=9530x1 Type=Byte, ColorInterp=Green
> > >>Band 3 Block=9530x1 Type=Byte, ColorInterp=Blue
> > >>
> >
> >_________________________________________________________________
> >Advertisement: Fresh jobs daily. Stop waiting for the newspaper. Search
> >now!
> >www.seek.com.au
> >http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Fninemsn%2Eseek%2Ecom%2Eau&_
>t
> >=757263760&_r=Hotmail_EndText_Dec06&_m=EXT
> >
>
>_________________________________________________________________
>Advertisement: Fresh jobs daily. Stop waiting for the newspaper. Search
>Now!
>www.seek.com.au
>http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Fninemsn%2Eseek%2Ecom%2Eau&_t
>=757263760&_r=Hotmail_EndText_Dec06&_m=EXT
>
_________________________________________________________________
Advertisement: Fresh jobs daily. Stop waiting for the newspaper. Search Now!
www.seek.com.au
http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Fninemsn%2Eseek%2Ecom%2Eau&_t=757263760&_r=Hotmail_EndText_Dec06&_m=EXT
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