v0.5.1

• Fix merge method. String pass to groupby option is used as property name in the layer created

v0.5.0

• remove arquero dependency that was present in two methods (properties and merge)
• ⚠️ project and unproject methods are now deprecated in order to remove proj4 dependency

v0.4.3

• when instantiate a topohelper class with a topojson, deep copy is optional and false by default.

v0.4.2

• fix toGeojson() to export proj property in all case
• view() is only available in chaining
• update readme with better usage information and link to observable demo

v0.4.0

• add project() and unproject() function. It's a naive approach: projection of arcs positions and Points|MultiPoints geometry. No clipping operation if geometry intersect projection limits (ex: antimeridian, poles).
• add an example page in dev mode. Work in progress.

V.0.3.3

• update merge()
  • rename option.group to option.groupby
  • support joining an external table. Similar to option.join in properties()
  • support aggregating properties with rollup arquero verb
• update innerlines() to rename option.group to option.groupby

v0.3.2

• update properties() to join an external table with a {join: {data, on, values}} option from join_left arquero verb.

v0.3.1

• update view() to add a zoom reset button

v0.3.0

• add toObjects() - export properties of a layer

v0.2.2

• fix centroids() - with spherical coordinates, calcul spherical centroids. Same for the largest polygon of MultiPolygon.