GeoPandas
I/O
Create gdf from df
python
import geopandas as gpd
import pandas as pd
from shapely.geometry import Point
project = pd.read_csv("project.csv")
project
geometry = [Point(xy) for xy in zip(project.longitude, project.latitude)]
crs = {"init": "epsg:4326"}
project = gpd.GeoDataFrame(project, crs=crs, geometry=geometry)
Change projection
python
geometry = [Point(xy) for xy in zip(input_df.longitude, input_df.latitude)]
input_df = gpd.GeoDataFrame(input_df, geometry=geometry).set_crs(epsg=4326)
Read
python
gpd.read_file(i, driver="GeoJson")
Write
python
df.to_file(out_path, driver="GeoJSONSeq")
Make square grid
python
import geopandas as gpd
import numpy as np
from shapely.geometry import Polygon
urban = gpd.read_file("urban_175m.shp")
xmin, ymin, xmax, ymax = urban.total_bounds
length = 0.00157
width = 0.00157
# cols = list(range(int(np.floor(xmin)), int(np.ceil(xmax)), wide))
cols = np.arange(xmin, xmax, length).tolist()
# rows = list(range(int(np.floor(ymin)), int(np.ceil(ymax)), lenght))
rows = np.arange(ymin, ymax, width).tolist()
rows.reverse()
polygons = []
for x in cols:
for y in rows:
polygons.append(
Polygon([(x, y), (x + wide, y), (x + wide, y - lenght), (x, y - lenght)])
)
g = gpd.GeoDataFrame(
{"data1": list(range(len(polygons))), "data2": list(range(10, 10 + len(polygons)))},
geometry=polygons,
crs={"init": "epsg:4326"},
)
g.to_file("temp.shp")