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Image header contents are specific to the grid scheme.
The C structure definition of this header is found in spatquant.h. It is reproduced below:
typedef struct { size_t ni, nj; long i_min, j_min; double x0, y0; double x_sz, y_sz; } RectRectImage;
ni
- The number of rows
nj
- The number of cols
i_min
j_min
- the minimum i and j indices of the matrix
x0
y0
- the x and y values corresponding to
i = j = 0
.x_sz
y_sz
- the extent of the bins in the x and y directions.
The C structure definition of this header is found in spatquant.h. It is reproduced below:
typedef struct { size_t ni, nj; long i_min, j_min; double x0, y0; double diameter; double x_sp, y_sp; } RectCircImage;
ni
- The number of rows
nj
- The number of cols
i_min
j_min
- the minimum i and j indices of the matrix
x0
y0
- the x and y values corresponding to
i = j = 0
.diameter
- the diameter of the bins
x_sp
- the spacing between bins in the x direction.
y_sp
- the spacing between bins in the y direction.
The C structure definition of this header is found in spatquant.h. It is reproduced below:
typedef struct { size_t ni, nj; long i_min, j_min; double x0, y0; double diameter, spacing; double x_sp, y_sp; } HexCircImage;
ni
- The number of rows
nj
- The number of cols
i_min
j_min
- the minimum i and j indices of the matrix
x0
y0
- the x and y values corresponding to
i = j = 0
.diameter
- the diameter of the bins
spacing
- the distance between centers of adjacent bins
x_sp
- the spacing between bins in the x direction. This is the same as the variable
spacing
.y_sp
- the spacing between bins in the y direction. This is just