geotiff

Documentation

Index

• Constants
• Variables
• type GeoTIFF
  • func (g *GeoTIFF) FindIFDEntryFromCode(tagCode int) (*IfdEntry, error)
  • func (g *GeoTIFF) FindIFDEntryFromName(tagName string) (*IfdEntry, error)
  • func (g *GeoTIFF) GetTags() (ret string)
  • func (g *GeoTIFF) Read(fileName string) (err error)
  • func (g *GeoTIFF) Write(fileName string) (err error)
• type GeoTiffTag
  • func (g GeoTiffTag) String() string
• type GeotiffDataType
  • func (g GeotiffDataType) GetBitLength() uint32
  • func (g GeotiffDataType) String() string
• type IfdEntry
  • func CreateIfdEntry(code int, dataType GeotiffDataType, count uint32, data interface{}, ...) IfdEntry
  • func (ifd *IfdEntry) AddData(data []byte)
  • func (ifd *IfdEntry) InterpretDataAsASCII() (u []string, err error)
  • func (ifd *IfdEntry) InterpretDataAsFloat() (u []float64, err error)
  • func (ifd *IfdEntry) InterpretDataAsInt() (u []uint, err error)
  • func (ifd *IfdEntry) InterpretDataAsRational() (u []float64, err error)
  • func (ifd IfdEntry) String() string
• type TiepointTransformationParameters

Constants

const (
	DT_Byte      = 1
	DT_ASCII     = 2
	DT_Short     = 3
	DT_Long      = 4
	DT_Rational  = 5
	DT_Sbyte     = 6
	DT_Undefined = 7
	DT_Sshort    = 8
	DT_Slong     = 9
	DT_Srational = 10
	DT_Float     = 11
	DT_Double    = 12
)

Data types (p. 14-16 of the spec).

const (
	PI_WhiteIsZero = 0
	PI_BlackIsZero = 1
	PI_RGB         = 2
	PI_Paletted    = 3
	PI_TransMask   = 4 // transparency mask
	PI_CMYK        = 5
	PI_YCbCr       = 6
	PI_CIELab      = 8
)

Photometric interpretation values (see p. 37 of the spec).

const (
	SF_UnsignedInteger = 1
	SF_SignedInteger   = 2
	SF_FloatingPoint   = 3
	SF_Uknown          = 4
)

Sample formats (page 80 of the spec).

Variables

var FileIsNotProperlyFormated = errors.New("The file does not appear to be properly formatted")

errors

var FileOpeningError = errors.New("An error occurred while opening the data file.")

var FileWritingError = errors.New("An error occurred while writing the data file.")

common errors

var TagNotFoundError = errors.New("Tag not found")

var UnsupportedDataTypeError = errors.New("Unsupported data type")

Types

type GeoTIFF

type GeoTIFF struct {
	ByteOrder  binary.ByteOrder
	NumGeoKeys int

	Rows          uint
	Columns       uint
	Data          []float64
	BitsPerSample []uint

	SampleFormat      uint
	PhotometricInterp uint

	TiepointData      TiepointTransformationParameters
	NodataValue       string
	RasterPixelIsArea bool
	EPSGCode          uint
	// contains filtered or unexported fields
}

func (*GeoTIFF) FindIFDEntryFromCode

func (g *GeoTIFF) FindIFDEntryFromCode(tagCode int) (*IfdEntry, error)

func (*GeoTIFF) FindIFDEntryFromName

func (g *GeoTIFF) FindIFDEntryFromName(tagName string) (*IfdEntry, error)

func (*GeoTIFF) GetTags

func (g *GeoTIFF) GetTags() (ret string)

func (*GeoTIFF) Read

func (g *GeoTIFF) Read(fileName string) (err error)

func (*GeoTIFF) Write

func (g *GeoTIFF) Write(fileName string) (err error)

type GeoTiffTag

type GeoTiffTag struct {
	Name string
	Code int
}

func (GeoTiffTag) String

func (g GeoTiffTag) String() string

type GeotiffDataType

type GeotiffDataType int

func (GeotiffDataType) GetBitLength

func (g GeotiffDataType) GetBitLength() uint32

func (GeotiffDataType) String

func (g GeotiffDataType) String() string

String returns the English name of the DataType ("Byte", "ASCII", ...).

type IfdEntry

type IfdEntry struct {
	// contains filtered or unexported fields
}

func CreateIfdEntry

func CreateIfdEntry(code int, dataType GeotiffDataType, count uint32, data interface{}, byteOrder binary.ByteOrder) IfdEntry

func (*IfdEntry) AddData

func (ifd *IfdEntry) AddData(data []byte)

func (*IfdEntry) InterpretDataAsASCII

func (ifd *IfdEntry) InterpretDataAsASCII() (u []string, err error)

ifdFloat decodes the IFD entry in p, which must be of the ASCII type, and returns the decoded uint values.

func (*IfdEntry) InterpretDataAsFloat

func (ifd *IfdEntry) InterpretDataAsFloat() (u []float64, err error)

func (*IfdEntry) InterpretDataAsInt

func (ifd *IfdEntry) InterpretDataAsInt() (u []uint, err error)

func (*IfdEntry) InterpretDataAsRational

func (ifd *IfdEntry) InterpretDataAsRational() (u []float64, err error)

func (IfdEntry) String

func (ifd IfdEntry) String() string

type TiepointTransformationParameters

type TiepointTransformationParameters struct {
	I, J, K, X, Y, Z       float64
	ScaleX, ScaleY, ScaleZ float64
}