Types for Raster Data and Operations

The following types are associated with operations specifically on raster data. These types use fixed, numeric constants, which are defined here.

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globalmapper.GM_BandLayout_t8

Definition of different band layouts

Values

GM_BandLayout_BIL = 0

Band Interleaved - All reds for row, then all greens for row, then all blues for row, then next row

GM_BandLayout_BSQ = 1

Band Sequential - All reds for image, then all greens for image, then all blues for image

GM_BandLayout_BIP = 2

Band Interleaved Pixel - RGB for each pixel

GM_BandLayout_Grayscale = 3

GM_BandLayout_NumBandLayouts = 4

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globalmapper.GM_BandValType_t8

Definition of different data types used for raster band values

Values

GM_VAL_U8 = 0

Unsigned 8-bit integer

GM_VAL_S8 = 1

Signed 8-bit integer

GM_VAL_U16 = 2

Unsigned 16-bit integer

GM_VAL_S16 = 3

Signed 16-bit integer

GM_VAL_U32 = 4

Unsigned 32-bit integer

GM_VAL_S32 = 5

Signed 32-bit integer

GM_VAL_U64 = 6

Unsigned 64-bit integer

GM_VAL_S64 = 7

Signed 64-bit integer

GM_VAL_F32 = 8

32-bit float

GM_VAL_F64 = 9

64-bit double

GM_VAL_NUM_TYPES = 10

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globalmapper.GM_PixelOrientation_t8

Definition of possible pixel orders for raw data in gridded layers

Values

GM_Orientation_TOPLEFT = 0

Row major, row 0 top, column 0 left-hand side

GM_Orientation_TOPRIGHT = 1

Row major, row 0 top, column 0 right-hand side

GM_Orientation_BOTRIGHT = 2

Row major, row 0 bottom, column 0 right-hand side

GM_Orientation_BOTLEFT = 3

Row major, row 0 bottom, column 0 left-hand side

GM_Orientation_LEFTTOP = 4

Column major, row 0 left-hand side, column 0 top

GM_Orientation_RIGHTTOP = 5

Column major, row 0 right-hand side, column 0 top

GM_Orientation_RIGHTBOT = 6

Column major, row 0 right-hand side, column 0 bottom

GM_Orientation_LEFTBOT = 7

Column major, row 0 left-hand side, column 0 bottom

GM_Orientation_NumTypes = 8

GM_Orientation_Default = GM_Orientation_TOPLEFT

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globalmapper.GM_RasterLayoutFlags_t32

This is a set of bit flags for custom raster layers

Values

GM_RasterLayout_BGROrder = 0x00000001

Color bands are in order BGR rather than RGB

GM_RasterLayout_AlphaPresent = 0x00000002

An alpha band is present. Use mAlphaBandIdx in GM_RasterLayout_t to specify band index.

GM_RasterLayout_CopyData = 0x00000004

Make copy of data so that caller doesn’t have to keep buffer around

GM_RasterLayout_ColMajorOrder = 0x00000008

Data is in column-major order rather than row-major

GM_RasterLayout_ReverseRows = 0x00000010

Data goes from bottom-to-top rather than top-to-bottom

GM_RasterLayout_ReverseCols = 0x00000020

Data goes from right-to-left rather than left-to-right

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globalmapper.GM_RasterTypeFlags_t32

Type defines what type of data a raster/elevation layer has. One or more of these flags can be set.

Values

GM_RasterType_Image = 0x00000001

Layer contains a rendered image (i.e. grid of colors)

GM_RasterType_ElevGrid = 0x00000002

Layer contains a grid of values that are treated as elevations (other flags may indicate true nature of data)

GM_RasterType_Density = 0x00000004

Grid values are actual density values calculated for a density grid

GM_RasterType_Roughness = 0x00000008

Grid values are actual roughness length values

GM_RasterType_ViewShed = 0x00000010

Color values are on or off values of a view shed

GM_RasterType_LandCover = 0x00000020

Color/grid values are for land cover classifications

GM_RasterType_PowerGrid = 0x00000040

Grid values are actually transmission power in dB (like from a view shed)

GM_RasterType_Count = 0x00000080

Grid values are a count or quality setting (like from combine/count operation)

GM_RasterType_Intensity = 0x00000100

Grid values are intensity values (typically from Lidar points)

GM_RasterType_NDVI = 0x00000200

Grid values are NDVI values

GM_RasterType_NDWI = 0x00000400

Grid values are NDWI values

GM_RasterType_Gravity = 0x00000800

Grid value are related to gravity, not elevation (acceleration or disturbance, usually in mGal)

GM_RasterType_Temp = 0x00001000

Grid value are temperature values, not elevation

GM_RasterType_Velocity = 0x00002000

Grid values are velocity values, not elevation

GM_RasterType_UnspecNonElev = 0x00004000

Grid values are unspecified non-elevation values

GM_RasterType_Class = 0x00008000

Grid values are some type of classification code

GM_RasterType_Curvature = 0x00010000

Grid values are curvature (1st derivative of slope) values

GM_RasterType_Slope = 0x00020000

Grid values are slope values

GM_RasterType_NoWaterMask = GM_RasterType_Density | GM_RasterType_Roughness | GM_RasterType_LandCover | GM_RasterType_PowerGrid | GM_RasterType_Count | GM_RasterType_Intensity | GM_RasterType_NDVI | GM_RasterType_NDWI | GM_RasterType_Temp | GM_RasterType_Velocity | GM_RasterType_UnspecNonElev | GM_RasterType_Class | GM_RasterType_Curvature | GM_RasterType_Slope

Defined mask for those grid types not to show water on

GM_RasterType_NoInterpolateMask = GM_RasterType_Roughness | GM_RasterType_Count | GM_RasterType_Class

Defined mask for those grid types to not interpolate

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globalmapper.GM_ResampleBoxOp_t

Get the box operation

Values

GM_BOX_OP_AVG = 0

Find average

GM_BOX_OP_MAX = 1

Find maximum

GM_BOX_OP_MIN = 2

Find minimum

GM_BOX_OP_MED = 3

Find median

GM_BOX_OP_BLUR = 4

Gaussian blur

GM_NUM_BOX_OPS = 5

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globalmapper.GM_SamplingMethod_t8

Enumeration of different raster/elevation sampling methods available

Values

Miscellaneous sampling methods

GM_SAMPLING_NEAREST_NEIGHBOR = 0

Nearest neighbor sampling

GM_SAMPLING_BILINEAR_INTERPOLATION = 1

Bilinear interpolation

GM_SAMPLING_BICUBIC_INTERPOLATION = 2

Bicubic interpolation

Box average methods

GM_SAMPLING_BOX_AVG_2X2 = 3

Box averager 2x2 grid

GM_SAMPLING_BOX_AVG_3X3 = 4

Box averager 3x3 grid

GM_SAMPLING_BOX_AVG_4X4 = 5

Box averager 4x4 grid

GM_SAMPLING_BOX_AVG_5X5 = 6

Box averager 5x5 grid

GM_SAMPLING_BOX_AVG_6X6 = 7

Box averager 6x6 grid

GM_SAMPLING_BOX_AVG_7X7 = 8

Box averager 7x7 grid

GM_SAMPLING_BOX_AVG_8X8 = 9

Box averager 8x8 grid

GM_SAMPLING_BOX_AVG_9X9 = 10

Box averager 9x9 grid

Box maximize methods

GM_SAMPLING_BOX_MAX_2X2 = 11

Box maximizer 2x2 grid

GM_SAMPLING_BOX_MAX_3X3 = 12

Box maximizer 3x3 grid

GM_SAMPLING_BOX_MAX_4X4 = 13

Box maximizer 4x4 grid

GM_SAMPLING_BOX_MAX_5X5 = 14

Box maximizer 5x5 grid

GM_SAMPLING_BOX_MAX_6X6 = 15

Box maximizer 6x6 grid

GM_SAMPLING_BOX_MAX_7X7 = 16

Box maximizer 7x7 grid

GM_SAMPLING_BOX_MAX_8X8 = 17

Box maximizer 8x8 grid

GM_SAMPLING_BOX_MAX_9X9 = 18

Box maximizer 9x9 grid

Box minimize methods

GM_SAMPLING_BOX_MIN_2X2 = 19

Box minimizer 2x2 grid

GM_SAMPLING_BOX_MIN_3X3 = 20

Box minimizer 3x3 grid

GM_SAMPLING_BOX_MIN_4X4 = 21

Box minimizer 4x4 grid

GM_SAMPLING_BOX_MIN_5X5 = 22

Box minimizer 5x5 grid

GM_SAMPLING_BOX_MIN_6X6 = 23

Box minimizer 6x6 grid

GM_SAMPLING_BOX_MIN_7X7 = 24

Box minimizer 7x7 grid

GM_SAMPLING_BOX_MIN_8X8 = 25

Box minimizer 8x8 grid

GM_SAMPLING_BOX_MIN_9X9 = 26

Box minimizer 9x9 grid

Box median methods

GM_SAMPLING_BOX_MED_2X2 = 27

Box median 2x2 grid

GM_SAMPLING_BOX_MED_3X3 = 28

Box median 3x3 grid

GM_SAMPLING_BOX_MED_4X4 = 29

Box median 4x4 grid

GM_SAMPLING_BOX_MED_5X5 = 30

Box median 5x5 grid

GM_SAMPLING_BOX_MED_6X6 = 31

Box median 6x6 grid

GM_SAMPLING_BOX_MED_7X7 = 32

Box median 7x7 grid

GM_SAMPLING_BOX_MED_8X8 = 33

Box median 8x8 grid

GM_SAMPLING_BOX_MED_9X9 = 34

Box median 9x9 grid

Box blur methods

GM_SAMPLING_BOX_BLUR_3X3 = 35

Box blur (Gaussian) 3x3 grid

GM_SAMPLING_BOX_BLUR_5X5 = 36

Box blur (Gaussian) 5x5 grid

GM_SAMPLING_BOX_BLUR_7X7 = 37

Box blur (Gaussian) 7x7 grid

Sampling method info

GM_NUM_SAMPLING_METHODS = 38

GM_SAMPLING_BOX_AVG_FIRST = GM_SAMPLING_BOX_AVG_2X2

GM_SAMPLING_BOX_AVG_LAST = GM_SAMPLING_BOX_AVG_9X9

GM_SAMPLING_BOX_MAX_FIRST = GM_SAMPLING_BOX_MAX_2X2

GM_SAMPLING_BOX_MAX_LAST = GM_SAMPLING_BOX_MAX_9X9

GM_SAMPLING_BOX_MIN_FIRST = GM_SAMPLING_BOX_MIN_2X2

GM_SAMPLING_BOX_MIN_LAST = GM_SAMPLING_BOX_MIN_9X9

GM_SAMPLING_BOX_MED_FIRST = GM_SAMPLING_BOX_MED_2X2

GM_SAMPLING_BOX_MED_LAST = GM_SAMPLING_BOX_MED_9X9

GM_SAMPLING_BOX_BLUR_FIRST = GM_SAMPLING_BOX_BLUR_3X3

GM_SAMPLING_BOX_BLUR_LAST = GM_SAMPLING_BOX_BLUR_7X7

Define maximum box size

GM_SAMPLING_MAX_BOX_SIZE = 9

GM_SAMPLING_MAX_BLUR_SIZE = 7

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globalmapper.ZLevel_t16

Feature Z levels

Values

Z level range

Z_LVL_MIN = 0x0000

Z_LVL_DFLT = 0x8000

Z_LVL_MAX = 0xFFFF

Z levels for areas

Z_LVL_LAND = Z_LVL_DFLT - 0x0800

Z_LVL_URBAN_AREA = Z_LVL_DFLT - 0x0700

Z_LVL_PARK = Z_LVL_DFLT - 0x0600

Z_LVL_SURFACE_COVER = Z_LVL_DFLT - 0x0500

Z_LVL_WATER = Z_LVL_DFLT - 0x0400

Z_LVL_INTERTIDAL = Z_LVL_DFLT - 0x0300

Z_LVL_ISOBATH = Z_LVL_DFLT - 0x0200

Z_LVL_MISC_MARINE = Z_LVL_DFLT + 0x0100

Z_LVL_BLDG_GROUND = Z_LVL_DFLT + 0x0101

Z_LVL_BLDG_FLOOR = Z_LVL_DFLT + 0x0102

Z_LVL_BLDG_WALL = Z_LVL_DFLT + 0x0103

Z_LVL_BLDG_ROOF = Z_LVL_DFLT + 0x0104

Z levels for lines

Z_LVL_CONTOURS = Z_LVL_DFLT - 0x0100

Z_LVL_ROADS = Z_LVL_DFLT + 0x0100

Z_LVL_POWERLINES = Z_LVL_DFLT + 0x0110

Z levels for multiple types

Z_LVL_BOUNDARIES = Z_LVL_DFLT + 0x0200

Z_LVL_MEASUREMENT = Z_LVL_DFLT + 0x0500