def create_grid_mapping_variable(nco, crs):
if crs.geographic:
crs_var = _create_latlon_grid_mapping_variable(nco, crs)
elif crs.projected:
crs_var = _create_projected_grid_mapping_variable(nco, crs)
else:
raise ValueError('Unknown CRS')
crs_var.semi_major_axis = crs.semi_major_axis
crs_var.semi_minor_axis = crs.semi_minor_axis
crs_var.inverse_flattening = crs.inverse_flattening
crs_var.crs_wkt = crs.wkt
crs_var.spatial_ref = crs.wkt
dims = crs.dimensions
xres, xoff = data_resolution_and_offset(nco[dims[1]])
yres, yoff = data_resolution_and_offset(nco[dims[0]])
crs_var.GeoTransform = [xoff, xres, 0.0, yoff, 0.0, yres]
left, right = nco[dims[1]][0] - 0.5 * xres, nco[dims[1]][-1] + 0.5 * xres
bottom, top = nco[dims[0]][0] - 0.5 * yres, nco[dims[0]][-1] + 0.5 * yres
points = [[left, bottom], [left, top], [right, top], [right, bottom]]
_write_geographical_extents_attributes(nco, GeoPolygon(points, crs))
return crs_var
def _make_dataset(labels, sources):
return make_dataset(product=output_type,
sources=sources,
extent=tile.geobox.extent,
center_time=labels['time'],
uri=file_path.absolute().as_uri(),
app_info=get_app_metadata(config, config['filename']),
valid_data=GeoPolygon.from_sources_extents(sources, tile.geobox))
def _make_dataset(labels, sources_):
return make_dataset(product=stat.product,
sources=sources_,
extent=geobox.extent,
center_time=labels['time'],
uri=uri,
app_info=app_info,
valid_data=GeoPolygon.from_sources_extents(
sources_, geobox))
def _make_dataset(labels, sources):
assert sources
dataset = make_dataset(product=output_product,
sources=sources,
extent=nbar.geobox.extent,
center_time=labels['time'],
uri=file_path.absolute().as_uri(),
app_info=get_app_metadata(config),
valid_data=GeoPolygon.from_sources_extents(sources, nbar.geobox))
return dataset
def _make_dataset(labels, sources):
sources_union = union_points(
*[source.extent.to_crs(geobox.crs).points for source in sources])
valid_data = intersect_points(geobox.extent.points, sources_union)
dataset = make_dataset(dataset_type=output_type,
sources=sources,
extent=geobox.extent,
center_time=labels['time'],
uri=file_path.absolute().as_uri(),
app_info=get_app_metadata(
config, config['filename']),
valid_data=GeoPolygon(valid_data, geobox.crs))
return dataset
def set_geobox_info(doc, crs, extent):
bb = extent.boundingbox
gp = GeoPolygon([(bb.left, bb.top), (bb.right, bb.top),
(bb.right, bb.bottom), (bb.left, bb.bottom)],
crs).to_crs(CRS('EPSG:4326'))
doc.update({
'extent': {
'coord': {
'ul': {
'lon': gp.points[0][0],
'lat': gp.points[0][1]
},
'ur': {
'lon': gp.points[1][0],
'lat': gp.points[1][1]
},
'lr': {
'lon': gp.points[2][0],
'lat': gp.points[2][1]
},
'll': {
'lon': gp.points[3][0],
'lat': gp.points[3][1]
},
}
},
'grid_spatial': {
'projection': {
'spatial_reference': str(crs),
'geo_ref_points': {
'ul': {
'x': bb.left,
'y': bb.top
},
'ur': {
'x': bb.right,
'y': bb.top
},
'll': {
'x': bb.left,
'y': bb.bottom
},
'lr': {
'x': bb.right,
'y': bb.bottom
},
}
}
}
})
def _make_dataset(labels, sources):
assert len(sources)
geobox = nbar.geobox
source_data = union_points(
*[dataset.extent.to_crs(geobox.crs).points for dataset in sources])
valid_data = intersect_points(geobox.extent.points, source_data)
dataset = make_dataset(product=output_type,
sources=sources,
extent=geobox.extent,
center_time=labels['time'],
uri=file_path.absolute().as_uri(),
app_info=get_app_metadata(config),
valid_data=GeoPolygon(valid_data, geobox.crs))
return dataset
def solar_vector(p, time, crs):
poly = GeoPolygon([p, (p[0], p[1] + 100)], crs).to_crs(CRS('EPSG:4326'))
lon, lat = poly.points[0]
dlon = poly.points[1][0] - lon
dlat = poly.points[1][1] - lat
# azimuth north to east of the vertical direction of the crs
vert_az = math.atan2(dlon * math.cos(math.radians(lat)), dlat)
observer = ephem.Observer()
observer.lat = math.radians(lat)
observer.lon = math.radians(lon)
observer.date = time
sun = ephem.Sun(observer)
sun_az = sun.az - vert_az
x = math.sin(sun_az) * math.cos(sun.alt)
y = -math.cos(sun_az) * math.cos(sun.alt)
z = math.sin(sun.alt)
return x, y, z, sun_az, sun.alt
def test_geobox():
points_list = [
[(148.2697, -35.20111), (149.31254, -35.20111),
(149.31254, -36.331431), (148.2697, -36.331431)],
[(148.2697, 35.20111), (149.31254, 35.20111), (149.31254, 36.331431),
(148.2697, 36.331431)],
[(-148.2697, 35.20111), (-149.31254, 35.20111),
(-149.31254, 36.331431), (-148.2697, 36.331431)],
[(-148.2697, -35.20111), (-149.31254, -35.20111),
(-149.31254, -36.331431), (-148.2697, -36.331431)],
]
for points in points_list:
polygon = GeoPolygon(points, CRS('EPSG:3577'))
resolution = (-25, 25)
geobox = GeoBox.from_geopolygon(polygon, resolution)
assert abs(resolution[0]) > abs(geobox.extent.boundingbox.left -
polygon.boundingbox.left)
assert abs(resolution[0]) > abs(geobox.extent.boundingbox.right -
polygon.boundingbox.right)
assert abs(resolution[1]) > abs(geobox.extent.boundingbox.top -
polygon.boundingbox.top)
assert abs(resolution[1]) > abs(geobox.extent.boundingbox.bottom -
polygon.boundingbox.bottom)
