Block diagram
This page hosts a formal specification of Shapefile index file using Kaitai Struct. This specification can be automatically translated into a variety of programming languages to get a parsing library.
meta:
id: shapefile_index
title: Shapefile index file
file-extension: shx
xref:
justsolve: Shapefile
loc: fdd000280 # ESRI Shapefile
pronom: fmt/277
wikidata: Q27487109
license: CC0-1.0
endian: le
seq:
- id: header
type: file_header
- id: records
type: record
repeat: eos
doc: the size of this section of the file in bytes must equal (header.file_length * 2) - 100
types:
file_header:
seq:
- id: file_code
contents: [0x00, 0x00, 0x27, 0x0a]
doc: corresponds to s4be value of 9994
- id: unused_field_1
contents: [0, 0, 0, 0]
- id: unused_field_2
contents: [0, 0, 0, 0]
- id: unused_field_3
contents: [0, 0, 0, 0]
- id: unused_field_4
contents: [0, 0, 0, 0]
- id: unused_field_5
contents: [0, 0, 0, 0]
- id: file_length
type: s4be
- id: version
contents: [0xe8, 0x03, 0x00, 0x00]
doc: corresponds to s4le value of 1000
- id: shape_type
type: s4
enum: shape_type
- id: bounding_box
type: bounding_box_x_y_z_m
record:
seq:
- id: offset
type: s4be
- id: content_length
type: s4be
bounding_box_x_y_z_m:
seq:
- id: x
type: bounds_min_max
- id: y
type: bounds_min_max
- id: z
type: bounds_min_max
- id: m
type: bounds_min_max
bounds_min_max:
seq:
- id: min
type: f8be
- id: max
type: f8be
enums:
shape_type:
0: null_shape
1: point
3: poly_line
5: polygon
8: multi_point
11: point_z
13: poly_line_z
15: polygon_z
18: multi_point_z
21: point_m
23: poly_line_m
25: polygon_m
28: multi_point_m
31: multi_patch