Install gma 2.0.3
pip install gma==2.0.3
New
?This version is the version with the largest feature update of gma 2, and is mainly focused on vector data processing.
?0.1 io.ReadVector: Directly open vector data as Layer to simplify the io.Open.GetLayer process. The new features of Layer are as follows:
| Serial number | Function | Property | Description | Return value type | |
|---|---|---|---|---|---|
| 1 | Layer1 + Layer2 | Special methods | such as Union | Layer | |
| 2 | Layer1 – Layer2 | Special methods | Such as Erase | Layer | |
| 3 | Layer1 & amp; Layer2 | Special methods | such as Intersection | Layer | |
| 4 | Layer1 | Layer2 | Special methods | such as Update | |
| 5 | list(Layer) | Special method | Generate Feature list | list | |
| 6 | len(Layer) | Special method | Count Feature quantity | int | |
| 7 | CalculateSummaryStatistics | Method | Summary statistical analysis | DataFrame | |
| 8 | Collect | Method | Group combination | Layer | |
| 9 | ConcaveHull | Method | Compute geometric concave hull | td> | Layer |
| 10 | ConvexHull | Method | Compute geometric convex hull | Layer | |
| 11 | DelaunayTriangulation | Method | Delaunay Triangulation | Layer | |
| 12 | Distance | Method | Calculate distance | DataFrame | |
| 13 | Envelope | Method | Generate outer box | Layer | |
| 14 | Explode | Method | Split multi-part elements | Layer | |
| 15 | Extent | Method | Extent rectangle | Layer | |
| 16 | ExteriorRing | Method | Outer loop | Layer | |
| 17 | GenGrid | Method | Generate vector grid | Layer | |
| 18 | GeomSelfTest | Method | Geometry Detection | DataFrame | |
| 19 | Identity | Method | Identity | Layer | |
| 20 | Info | Properties | Layer Information | DataFrame | |
| 21 | Multi | Method | Generate multi-part features | Layer | |
| 22 | PointOnSurface | Method | Polygon inner center point | Layer | |
| 23 | Preview | Method | Preview vector on map | PlotLayer | |
| 24 | RemoveRepeatedPoints | Method | Remove duplicate points | Layer | |
| 25 | Single | Method | Simplify elements | Layer | |
| 26 | VerticesToPoints | Method | Vertex to point | Layer | |
| 27 | VoronojDiagram | Method | Tyson Polygon | Layer |
?0.2 io.ReadRaster: Open raster data directly into DataSet to simplify the io.Open.GetDataSet process. The new features of DataSet are as follows:
| Serial number | Function | Property | Description | Return value type |
|---|---|---|---|---|
| 1 | Preview | Method | Preview DataSet on the map | PlotDataSet |
Repair
?1.Layer-Intersection|Union|SymDifference
Fix the problem of exceptions caused when calling continuously.
?2. Kernel crash
Fixed some issues that could easily cause Python kernel to crash.
Adjustment
?1. Vector data internal exchange format
Vector data memory (internal) exchange format changed from Memory to GPKG geodatabase format.
?2. Spyder variable browser
Add support for viewing Layer property sheets in the Spyder variable browser.
?2. Band number
The band numbers of raster data uniformly start from 1. Some zero-based functions have been adjusted.
Simple example
gma 2 and sample data download:
Link: https://pan.baidu.com/s/1v9flUXmsgYPZUbzR88SIOA?pwd=h9b8
Extraction code: h9b8
from gma import io
Layer = io.ReadVector("Luoyang.gpkg")
Preview data
Layer.Preview()
Buffer
BF = Layer.Buffer(0.05) BF.Preview()
Element vertex to point
VPoints = Layer.VerticesToPoints() VPoints.Preview()
Generate square grid
Grid = Layer.GenGrid(Size = 0.05) Grid.Preview()
Simplify (here to avoid generating abnormal polygons) and generate Thiessen polygons
VD = Layer.Simplify(0.0001).VoronojDiagram() VD.Preview()
Simplify (here to avoid generating abnormal polygons) and generate Delaunay triangulation
VD = Layer.Simplify(0.0001).DelaunayTriangulation() VD.Preview()
