All input grids must consist of perfectly square cells with cell size specified in meters. For
certain input formats (ASCII and BINARY), this is not an issue because cells are assumed to be
square and you are required to enter the cell size (in meters) in the graphical user interface.
FRAGSTATS assumes all other grid formats include header information that defines cell size.
Consequently these grids must have a metric projection (e.g., UTM) to ensure that cell size is
given in metric units. With the exception of ESRI ArcGrids (see below), FRAGSTATS accepts
cells that exhibit differences between height and width less than 0.1%. This means that cells
need to be approximately square, usually out to several decimal places. With respect to ESRI
ArcGrids, FRAGSTATS cannot accept anything but perfectly square cells. Importantly, this is a
31
hidden problem with ESRI ArcGrids in some cases. Although the grid description will say the
cells are square, this can be an artifact of the rounding done for display purposes.
All input grids must consist of perfectly square cells with cell size specified in meters. Forcertain input formats (ASCII and BINARY), this is not an issue because cells are assumed to besquare and you are required to enter the cell size (in meters) in the graphical user interface.FRAGSTATS assumes all other grid formats include header information that defines cell size.Consequently these grids must have a metric projection (e.g., UTM) to ensure that cell size isgiven in metric units. With the exception of ESRI ArcGrids (see below), FRAGSTATS acceptscells that exhibit differences between height and width less than 0.1%. This means that cellsneed to be approximately square, usually out to several decimal places. With respect to ESRIArcGrids, FRAGSTATS cannot accept anything but perfectly square cells. Importantly, this is a31hidden problem with ESRI ArcGrids in some cases. Although the grid description will say thecells are square, this can be an artifact of the rounding done for display purposes.
การแปล กรุณารอสักครู่..
