shapef is a simple program for converting shape definitions from a JSON file to an ESRI Shapefile. It uses the go-shp module and is currently just used for generating test files for openLCA.
It has the following limitations:
- It only generates single-line polygon features
- Only numbers and strings are allowed as attribute values of features
- No validation of user input and no user friendly error handling
- ...
(Feel free to send pull-requists to improve this)
The shapef executable expects a JSON file as input:
shapef <file prefix>.json
This will generate the following files if everything is correct:
<file prefix>.shpthe main file of the shapefile<file prefix>.shxthe index file of the features in the shapefile<file prefix>.dbfthe dBASE file with the attribute data of the features
The JSON format of the input file is as follows:
- The file should contain an array of feature objects.
- The coordinates of the features are stored as array of points in the
pointsfield. - Each point is a simple array with two numbers: the x- and y-coordinate.
- The attributes of the features are stored as key-value pairs in the
datafield.
[
{
"points": [[0, 0], [10, 0], [10, 10], [0, 10]],
"data": {
"label": "Shape 1",
"value": 42,
"code": "AB"
}
},
{
"points": [[10, 0], [20, 0], [20, 10], [10, 10]],
"data": {
"label": "Shape 2",
"value": 24,
"code": "CD"
}
}
]