geotiff

package

v0.0.0-...-d99e8d0 Latest Latest Go to latest Published: Apr 24, 2018 License: MIT Imports: 13 Imported by: 0

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Repository

github.com/jblindsay/go-spatial

Links

Open Source Insights

Documentation ¶

Index ¶

Constants
Variables
type GeoTIFF
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
type TiepointTransformationParameters

Constants ¶

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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).

View Source

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).

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

Sample formats (page 80 of the spec).

Variables ¶

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

errors

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

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

common errors

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

View Source

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

Functions ¶

This section is empty.

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
}

Source Files ¶

View all Source files

Directories ¶

Path	Synopsis
lzw Package lzw implements the Lempel-Ziv-Welch compressed data format, described in T. A. Welch, “A Technique for High-Performance Data Compression”, Computer, 17(6) (June 1984), pp 8-19.	Package lzw implements the Lempel-Ziv-Welch compressed data format, described in T. A. Welch, “A Technique for High-Performance Data Compression”, Computer, 17(6) (June 1984), pp 8-19.

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