Module wire 

Wire-level encoding metadata - for tile analysis and tooling.

These types describe the physical and logical encoding of streams inside an MLT tile. Normal tile consumers (parse -> iterate features) do not need this module; it is intended for tools that inspect or report encoding statistics.

Structs

Alp

Framed, Exception-Free ALP parameters: v = (base + offset) * 10^f / 10^e. Written as a scale byte and a base varint, the stream itself holding the unsigned offsets.

ColumnStorage

How a column stores its values, beyond what its streams’ encodings already say.

IntEncoding

Morton

Metadata for Morton decoding

StreamMeta

Metadata about an encoded stream

Enums

BoolLogical

Logical encoding of a bool column’s data stream or a presence bitfield.

ColumnDecl

What a column declares on the wire, before decoding resolves it away.

ColumnType

Column data type, as stored in the tile.

DictLayout

How a dictionary’s entries sit in its blob.

DictionaryType

Dictionary type used for a column, as stored in the tile

FastPForKind

The FastPFor block size and word order a wire version codes its integer streams with.

FloatLogical

Logical encoding of a float column’s data stream.

IntLogical

Logical encoding of a stream of integer values. Covers the id columns, the integer property columns, and the geometry length and offset streams.

LengthType

Length type used for a column, as stored in the tile

LogicalEncoding

How should the stream be interpreted at the logical level (second pass of decoding)

LogicalTechnique

Logical encoding technique used for a column, as stored in the tile

OffsetType

Offset type used for a column, as stored in the tile

PhysicalEncoding

Physical encoding used for a column, as stored in the tile

RleLayout

Which RLE stream layout the encoder should produce.

RleMeta

Metadata for RLE decoding, one variant per RleLayout.

StatType

What to calculate with Analyze::collect_statistic.

StreamType

How should the stream be interpreted at the physical level (first pass of decoding)

StringLayout

How a string column’s values sit in the tile, as the extension bits of its leading stream name.

ValueKind

What kind of values a stream holds, which fixes the encodings it can name. Neither wire format stores it: v1 reads it from the column type, v2 from the stream’s context.

VertexLogical

Logical encoding of a geometry vertex stream, whose values are interleaved coordinate pairs.

Traits

Analyze

Trait for estimating various size/count metrics.