vector_tile

package
v0.0.13-a Latest Latest
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 Go to latest Published: Jun 15, 2016 License: MIT Imports: 6 Imported by: 3

Documentation

Overview

Package vector_tile provides the go code needed to read and write Mapbox vector tiles (https://github.com/mapbox/vector-tile-spec). Most of the code is autogenerated, but there are a few helpers the make encoded and decoded the tiles a little easier.

Package vector_tile is a generated protocol buffer package.

It is generated from these files: 

vector_tile.proto

It has these top-level messages: 

Tile

Index

Constants

View Source 
const Default_Tile_Feature_Id uint64 = 0
View Source 
const Default_Tile_Layer_Extent uint32 = 4096
View Source 
const Default_Tile_Layer_Version uint32 = 1

Variables

View Source 
var Tile_GeomType_name = map[int32]string{
	0: "UNKNOWN",
	1: "POINT",
	2: "LINESTRING",
	3: "POLYGON",
}
View Source 
var Tile_GeomType_value = map[string]int32{
	"UNKNOWN":    0,
	"POINT":      1,
	"LINESTRING": 2,
	"POLYGON":    3,
}

Functions

func Encode 

func Encode(tile *Tile) ([]byte, error)

Encode protobuf encodes the tile into a byte buffer.

func EncodeGzipped 

func EncodeGzipped(tile *Tile) ([]byte, error)

EncodeGzipped gzips the data after encoding the tile via protocol buffers.

Types

type Tile 

type Tile struct {
	Layers           []*Tile_Layer             `protobuf:"bytes,3,rep,name=layers" json:"layers,omitempty"`
	XXX_extensions   map[int32]proto.Extension `json:"-"`
	XXX_unrecognized []byte                    `json:"-"`
}

func Decode 

func Decode(data []byte) (*Tile, error)

Decode has the protobuf library decode the data into a tile.

func DecodeGzipped 

func DecodeGzipped(data []byte) (*Tile, error)

DecodeGzipped first ungzips the data before having the protobuf library decode the data into a tile.

func (*Tile) Descriptor 

func (*Tile) Descriptor() ([]byte, []int)

func (*Tile) ExtensionMap 

func (m *Tile) ExtensionMap() map[int32]proto.Extension

func (*Tile) ExtensionRangeArray 

func (*Tile) ExtensionRangeArray() []proto.ExtensionRange

func (*Tile) GetLayers 

func (m *Tile) GetLayers() []*Tile_Layer

func (*Tile) ProtoMessage 

func (*Tile) ProtoMessage()

func (*Tile) Reset 

func (m *Tile) Reset()

func (*Tile) String 

func (m *Tile) String() string

type Tile_Feature 

type Tile_Feature struct {
	Id *uint64 `protobuf:"varint,1,opt,name=id,def=0" json:"id,omitempty"`
	// Tags of this feature are encoded as repeated pairs of
	// integers.
	// A detailed description of tags is located in sections
	// 4.2 and 4.4 of the specification
	Tags []uint32 `protobuf:"varint,2,rep,packed,name=tags" json:"tags,omitempty"`
	// The type of geometry stored in this feature.
	Type *Tile_GeomType `protobuf:"varint,3,opt,name=type,enum=vector_tile.Tile_GeomType,def=0" json:"type,omitempty"`
	// Contains a stream of commands and parameters (vertices).
	// A detailed description on geometry encoding is located in
	// section 4.3 of the specification.
	Geometry         []uint32 `protobuf:"varint,4,rep,packed,name=geometry" json:"geometry,omitempty"`
	XXX_unrecognized []byte   `json:"-"`
}

Features are described in section 4.2 of the specification

func (*Tile_Feature) Descriptor 

func (*Tile_Feature) Descriptor() ([]byte, []int)

func (*Tile_Feature) GetGeometry 

func (m *Tile_Feature) GetGeometry() []uint32

func (*Tile_Feature) GetId 

func (m *Tile_Feature) GetId() uint64

func (*Tile_Feature) GetTags 

func (m *Tile_Feature) GetTags() []uint32

func (*Tile_Feature) GetType 

func (m *Tile_Feature) GetType() Tile_GeomType

func (*Tile_Feature) ProtoMessage 

func (*Tile_Feature) ProtoMessage()

func (*Tile_Feature) Reset 

func (m *Tile_Feature) Reset()

func (*Tile_Feature) String 

func (m *Tile_Feature) String() string

type Tile_GeomType 

type Tile_GeomType int32

GeomType is described in section 4.3.4 of the specification 

const (
	Tile_UNKNOWN    Tile_GeomType = 0
	Tile_POINT      Tile_GeomType = 1
	Tile_LINESTRING Tile_GeomType = 2
	Tile_POLYGON    Tile_GeomType = 3
)
const Default_Tile_Feature_Type Tile_GeomType = Tile_UNKNOWN

func (Tile_GeomType) Enum 

func (x Tile_GeomType) Enum() *Tile_GeomType

func (Tile_GeomType) EnumDescriptor 

func (Tile_GeomType) EnumDescriptor() ([]byte, []int)

func (Tile_GeomType) String 

func (x Tile_GeomType) String() string

func (*Tile_GeomType) UnmarshalJSON 

func (x *Tile_GeomType) UnmarshalJSON(data []byte) error

type Tile_Layer 

type Tile_Layer struct {
	// Any compliant implementation must first read the version
	// number encoded in this message and choose the correct
	// implementation for this version number before proceeding to
	// decode other parts of this message.
	Version *uint32 `protobuf:"varint,15,req,name=version,def=1" json:"version,omitempty"`
	Name    *string `protobuf:"bytes,1,req,name=name" json:"name,omitempty"`
	// The actual features in this tile.
	Features []*Tile_Feature `protobuf:"bytes,2,rep,name=features" json:"features,omitempty"`
	// Dictionary encoding for keys
	Keys []string `protobuf:"bytes,3,rep,name=keys" json:"keys,omitempty"`
	// Dictionary encoding for values
	Values []*Tile_Value `protobuf:"bytes,4,rep,name=values" json:"values,omitempty"`
	// The bounding box in this tile spans from 0..4095 units
	// Although this is an "optional" field it is required by the specification.
	// See https://github.com/mapbox/vector-tile-spec/issues/47
	Extent           *uint32                   `protobuf:"varint,5,opt,name=extent,def=4096" json:"extent,omitempty"`
	XXX_extensions   map[int32]proto.Extension `json:"-"`
	XXX_unrecognized []byte                    `json:"-"`
}

Layers are described in section 4.1 of the specification

func (*Tile_Layer) Descriptor 

func (*Tile_Layer) Descriptor() ([]byte, []int)

func (*Tile_Layer) ExtensionMap 

func (m *Tile_Layer) ExtensionMap() map[int32]proto.Extension

func (*Tile_Layer) ExtensionRangeArray 

func (*Tile_Layer) ExtensionRangeArray() []proto.ExtensionRange

func (*Tile_Layer) GetExtent 

func (m *Tile_Layer) GetExtent() uint32

func (*Tile_Layer) GetFeatures 

func (m *Tile_Layer) GetFeatures() []*Tile_Feature

func (*Tile_Layer) GetKeys 

func (m *Tile_Layer) GetKeys() []string

func (*Tile_Layer) GetName 

func (m *Tile_Layer) GetName() string

func (*Tile_Layer) GetValues 

func (m *Tile_Layer) GetValues() []*Tile_Value

func (*Tile_Layer) GetVersion 

func (m *Tile_Layer) GetVersion() uint32

func (*Tile_Layer) ProtoMessage 

func (*Tile_Layer) ProtoMessage()

func (*Tile_Layer) Reset 

func (m *Tile_Layer) Reset()

func (*Tile_Layer) String 

func (m *Tile_Layer) String() string

type Tile_Value 

type Tile_Value struct {
	// Exactly one of these values must be present in a valid message
	StringValue      *string                   `protobuf:"bytes,1,opt,name=string_value" json:"string_value,omitempty"`
	FloatValue       *float32                  `protobuf:"fixed32,2,opt,name=float_value" json:"float_value,omitempty"`
	DoubleValue      *float64                  `protobuf:"fixed64,3,opt,name=double_value" json:"double_value,omitempty"`
	IntValue         *int64                    `protobuf:"varint,4,opt,name=int_value" json:"int_value,omitempty"`
	UintValue        *uint64                   `protobuf:"varint,5,opt,name=uint_value" json:"uint_value,omitempty"`
	SintValue        *int64                    `protobuf:"zigzag64,6,opt,name=sint_value" json:"sint_value,omitempty"`
	BoolValue        *bool                     `protobuf:"varint,7,opt,name=bool_value" json:"bool_value,omitempty"`
	XXX_extensions   map[int32]proto.Extension `json:"-"`
	XXX_unrecognized []byte                    `json:"-"`
}

Variant type encoding The use of values is described in section 4.1 of the specification

func (*Tile_Value) Descriptor 

func (*Tile_Value) Descriptor() ([]byte, []int)

func (*Tile_Value) ExtensionMap 

func (m *Tile_Value) ExtensionMap() map[int32]proto.Extension

func (*Tile_Value) ExtensionRangeArray 

func (*Tile_Value) ExtensionRangeArray() []proto.ExtensionRange

func (*Tile_Value) GetBoolValue 

func (m *Tile_Value) GetBoolValue() bool

func (*Tile_Value) GetDoubleValue 

func (m *Tile_Value) GetDoubleValue() float64

func (*Tile_Value) GetFloatValue 

func (m *Tile_Value) GetFloatValue() float32

func (*Tile_Value) GetIntValue 

func (m *Tile_Value) GetIntValue() int64

func (*Tile_Value) GetSintValue 

func (m *Tile_Value) GetSintValue() int64

func (*Tile_Value) GetStringValue 

func (m *Tile_Value) GetStringValue() string

func (*Tile_Value) GetUintValue 

func (m *Tile_Value) GetUintValue() uint64

func (*Tile_Value) ProtoMessage 

func (*Tile_Value) ProtoMessage()

func (*Tile_Value) Reset 

func (m *Tile_Value) Reset()

func (*Tile_Value) String 

func (m *Tile_Value) String() string

Source Files

View all Source files

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