GOODE HOMOLOSINE PROJECTION

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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