[GRASS-dev] Have Elevation raster maps always CELL data type

GRASS GRASS developer
1

Hello everyone,
I’m working on a module that receive an elevation raster map in input.
I’m a newbie with GRASS and I’d like to know if this kind of raster map (elevation) has always CELL data type or it can happen that there’re some elevation maps with FCELL or DCELL data type.

Regards,
Roberto

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2

On Apr 1, 2008, at 10:43 AM, roberto caselli wrote:

Hello everyone,
I'm working on a module that receive an elevation raster map in input.
I'm a newbie with GRASS and I'd like to know if this kind of raster map (elevation) has always CELL data type or it can happen that there're some elevation maps with FCELL or DCELL data type.

There are many that are FCELL, Helena

Regards,
Roberto

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3

Is the unit of measurement in meters ?
PS: I got the spearfish data set.

Helena Mitasova hmitaso@unity.ncsu.edu ha scritto:

On Apr 1, 2008, at 10:43 AM, roberto caselli wrote:

Hello everyone,
I’m working on a module that receive an elevation raster map in input.
I’m a newbie with GRASS and I’d like to know if this kind of raster
map (elevation) has always CELL data type or it can happen that
there’re some elevation maps with FCELL or DCELL data type.

There are many that are FCELL, Helena

Regards,
Roberto

Scopri il Blog di Yahoo! Mail: trucchi, novità, consigli… e la
tua opinione!

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4

roberto caselli wrote:

Is the unit of measurement in meters ?

elevation can be in whatever units you like. Typically they are in meters
but that is not required. You can use r.support to add meta-data info
about what units were used.

PS: I got the spearfish data set.

the elevation maps supplied with the spearfish dataset are all in meters,
AFAIK.

GRASS> r.info elevation.dem
....
Data Description:
Elevation above mean sea level in meters for spearfish database

Hamish

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