postgis

Documentation

Index

• Constants
• func NewProvider(config map[string]interface{}) (mvt.Provider, error)
• type Layer
  • func (l Layer) GeomFieldName() string
  • func (l Layer) GeomType() tegola.Geometry
  • func (l Layer) IDFieldName() string
  • func (l Layer) Name() string
  • func (l Layer) SRID() int
• type Provider
  • func (p *Provider) ForEachFeature(ctx context.Context, layerName string, tile tegola.Tile, ...) error
  • func (p *Provider) Layer(name string) (Layer, bool)
  • func (p Provider) Layers() ([]mvt.LayerInfo, error)
  • func (p Provider) MVTLayer(ctx context.Context, layerName string, tile tegola.Tile, ...) (layer *mvt.Layer, err error)

Constants

const (
	DefaultPort    = 5432
	DefaultSRID    = tegola.WebMercator
	DefaultMaxConn = 100
)

const (
	ConfigKeyHost        = "host"
	ConfigKeyPort        = "port"
	ConfigKeyDB          = "database"
	ConfigKeyUser        = "user"
	ConfigKeyPassword    = "password"
	ConfigKeyMaxConn     = "max_connection"
	ConfigKeySRID        = "srid"
	ConfigKeyLayers      = "layers"
	ConfigKeyLayerName   = "name"
	ConfigKeyTablename   = "tablename"
	ConfigKeySQL         = "sql"
	ConfigKeyFields      = "fields"
	ConfigKeyGeomField   = "geometry_fieldname"
	ConfigKeyGeomIDField = "id_fieldname"
)

const Name = "postgis"

Functions

func NewProvider

func NewProvider(config map[string]interface{}) (mvt.Provider, error)

	NewProvider Setups and returns a new postgis provider or an error; if something
	is wrong. The function will validate that the config object looks good before
	trying to create a driver. This means that the Provider expects the following
	fields to exists in the provided map[string]interface{} map:

		host (string) — the host to connect to.
		port (uint16) — the port to connect on.
		database (string) — the database name
		user (string) — the user name
		password (string) — the Password
		max_connections (*uint8) // Default is 5 if nil, 0 means no max.
		layers (map[string]struct{})  — This is map of layers keyed by the layer name.
    		tablename (string || sql string) — This is the sql to use or the tablename to use with the default query.
    		fields ([]string) — This is a list, if this is nil or empty we will get all fields.
    		geometry_fieldname (string) — This is the field name of the geometry, if it's an empty string or nil, it will defaults to 'geom'.
    		id_fieldname (string) — This is the field name for the id property, if it's an empty string or nil, it will defaults to 'gid'.

Types

type Layer

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

layer holds information about a query.

func (Layer) GeomFieldName

func (l Layer) GeomFieldName() string

func (Layer) GeomType

func (l Layer) GeomType() tegola.Geometry

func (Layer) IDFieldName

func (l Layer) IDFieldName() string

func (Layer) Name

func (l Layer) Name() string

func (Layer) SRID

func (l Layer) SRID() int

type Provider

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

Provider provides the postgis data provider.

func (*Provider) ForEachFeature

func (p *Provider) ForEachFeature(ctx context.Context, layerName string, tile tegola.Tile, fn func(layer Layer, gid uint64, geom wkb.Geometry, tags map[string]interface{}) error) error

func (*Provider) Layer

func (p *Provider) Layer(name string) (Layer, bool)

func (Provider) Layers

func (p Provider) Layers() ([]mvt.LayerInfo, error)

func (Provider) MVTLayer

func (p Provider) MVTLayer(ctx context.Context, layerName string, tile tegola.Tile, dtags map[string]interface{}) (layer *mvt.Layer, err error)