Hi, can you open the tfw file with text editor, maybe tiff is projected?
Then you will have to specify( reproject) coordinates of points.
--
Oleksandr Huziy
Sent from my HTC
----- Reply message -----
From: "David Purdy" <[email protected]>
To: "'Brian Behling'" <[email protected]>
Cc: <[email protected]>
Subject: [Geotools-gt2-users] Coordinate Reference System is not available
issue...
Date: Sat, Jan 26, 2013 8:53 PM
If projection information is only found in a .prj file then my GeoTiff image
does not have it. How do I go about getting that info?Also, I am not sure what
you mean by "GPS points are not projected but are in a geographic coordinate
system such as WGS84"? I am basically doing the following to plot each point
onto the map: final SimpleFeatureType point = createFeatureTypePoint();final
SimpleFeatureBuilder BLDR = new SimpleFeatureBuilder(point);Coordinate coord =
new Coordinate(gpsData.getLongitude().doubleValue(),
gpsData.getLatitude().doubleValue());pointCollection.add(createPoint(BLDR,
coord, getPointId())); That createPoint method just uses GeometryFactory to
create the point. Thanks,Dave From: Brian Behling
[mailto:[email protected]]
Sent: Saturday, January 26, 2013 7:34 PM
To: David Purdy
Cc: [email protected]
Subject: Re: [Geotools-gt2-users] Coordinate Reference System is not available
issue... Does yur GeoTiff image have projection information? I think it may
need a .prj file. Typically GPS points are not projected but are in a
geographic coordinate system such as WGS84. sent from 'droidOn Jan 26, 2013
4:49 PM, "David Purdy" <[email protected]> wrote:Hi All, I am working
on an application that plots points from a GPS and has many other features.My
issue is that the points being plotted on the chart seems to be off by a fairly
decent amount. I would say somewhere in the order of 20 miles south or so from
the actual GPS coordinates. I do notice that I am getting a warning displayed
during reading of the TIFF image for the chart. The warning is: "WARNING:
Coordinate Reference is not available". Is this warning the reason my plotted
points are off from where they should be displayed? Or would that be because
of some other reason? I don't see anywhere to define the coordinate reference
system. I have poured over all of your tutorials to see if I am missing
something. In this case, I am reading in 13001_3.tif and I also have a file
named 13001_3.tfw in the same directory where I am reading from. Below is the
code I have for reading the *.tif file: map = new MapContent(); File rasterFile
= new File(geoTiffFilesDir + "/" + selectedMapFile);String rasterFilePath =
rasterFile.getPath();rasterFilePath = rasterFilePath.replace('\\',
'/');AbstractGridFormat format = GridFormatFinder.findFormat( rasterFile
);AbstractGridCoverage2DReader reader = format.getReader(rasterFile);
StyleBuilder styleBuilder = new StyleBuilder();RasterSymbolizer rastSymbolizer
= styleBuilder.createRasterSymbolizer();Style style =
styleBuilder.createStyle(rastSymbolizer);GridReaderLayer rasterLayer = new
GridReaderLayer(reader, style);map.layers().add(layerIndex, rasterLayer); I
appreciate any help!! Thanks,Dave
--------------------------------------------David PurdyOwner/PresidentJJM
Technologies CorporationEmail: [email protected]: 508.972.1266
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Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS,
MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current
with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft
MVPs and experts. ON SALE this month only -- learn more at:
http://p.sf.net/sfu/learnnow-d2d
_______________________________________________
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