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GOODE HOMOLOSINE PROJECTION   cristina postigo Jul 24, 2006
Re: GOODE HOMOLOSINE PROJECTION   Melita Kennedy Jul 24, 2006
Re: GOODE HOMOLOSINE PROJECTION   cristina postigo Jul 25, 2006
Re: GOODE HOMOLOSINE PROJECTION   Melita Kennedy Jul 25, 2006
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Subject GOODE HOMOLOSINE PROJECTION 
Author cristina postigo 
Date Jul 24, 2006 
Message Hallo, I am having problems to work with Goode homolosine proyection in ArcGIS...
I downloaded from the GLCF, the eurasian maps containing vegetation continous fields and tree cover continous fields (the tree cover continuous fields proyected in lat-long I am not able to see them in arcGIS)...
well the information they contain is really important for me as I have to calculate the plant interception of a water catchment area located in the south of Germany.. (DHDN3 zone 3 - gauss krueger) or (WSG84 zone 32 N)

I was asking several people and looking into the internet and I am not able to change this projection system... so I can not select the data of the area I am working with (my catchment appears many thousands of kilometres away of Eurasia).... so please, could you help me to sort this out??

I downloaded as well the routine written in C available in
ftp://edcftp.cr.usgs.gov/pub/software/misc/gihll2ls.c
but when I compile it, it has a lot of errors.... and I am not very good at programming... a friend of mine could reduce the amount of errors to three, but he was not able to eliminate them all...

So, my questionh is... do you have an executable file of GIHLL2LS? Is there another way of transforming this projection to a simple one?

Please, I need help, as I have to finish writting my thesis in one month and I have been three weeks stuck with this issue...

Thanks a lot in advance..

Best regards

cristina

PD: the availabe software I can work with is ArcGIS 9 and ArcVIew 3.3. 
   
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Subject Re: GOODE HOMOLOSINE PROJECTION 
Author Melita Kennedy 
Date Jul 24, 2006 
Message Cristina,

We have added Goode's Homolosine to ArcGIS 9.2, but that doesn't help you right now. Goode's is made from two map projections. Above 40 deg 44 min, the map projection is Mollweide. For Europe, the central meridian is 30 East.

Try using (start with Mollweide (world) in the projected coordinate system, world folder):

false easting: 3339581
false northing: -336790
central meridian: 30.0
units: meter

geographic coordinate system: WGS84

Depending on how the Goode's was defined for your data, these values are probably not correct. You can adjust the false easting and northing to get it to line up with your other data. Try matching it to the WGS84 UTM 32N data first.

Melita 
  Melita Kennedy
ESRI Product Specialist 
   
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Subject Re: GOODE HOMOLOSINE PROJECTION 
Author cristina postigo 
Date Jul 25, 2006 
Message Thanks Melita!

It worked with the tif. files that corresponde with continous vegetation fields...

The continous tree cover fields came with bin.gz extension. I got them opened in ArcView 3.3, renaming them after decompressing them into .bsq and creating a header for them...then I converted them into grid files to be able to open them in arcMap... Finally I applied the Mollweide projection to them... but nothing changes...

Anyway somebody told me about another land cover data from a EU project called CORINA, and I am going to give them a try... they come in UTM!! :-)

Thanks again

Regards

Cristina 
   
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Subject Re: GOODE HOMOLOSINE PROJECTION 
Author Melita Kennedy 
Date Jul 25, 2006 
Message If you have to go back to your GRID data, workstation doesn't support false easting/northing with Mollweide, but try this prj.adf file for the GRID (just copy it into the GRID's folder)

projection mollweide
units meters
datum wgs84
xshift -3339581
yshift 336790
parameters
30 0 0.0


Melita 
  Melita Kennedy
ESRI Product Specialist