def tile(
scene: str,
z: int,
x: int,
y: int,
scale: int = 1,
ext: str = "png",
bands: str = None,
percents: str = "",
expr: str = None,
rescale: str = None,
color_formula: str = None,
color_map: str = None,
) -> Tuple[str, str, BinaryIO]:
"""Handle tile requests."""
driver = "jpeg" if ext == "jpg" else ext
if bands and expr:
raise CbersTilerError("Cannot pass bands and expression")
tilesize = scale * 256
if expr is not None:
tile, mask = expression(scene, x, y, z, expr=expr, tilesize=tilesize)
elif bands is not None:
tile, mask = cbers_tile(scene,
x,
y,
z,
bands=tuple(bands.split(",")),
tilesize=tilesize,
percents=percents)
else:
raise CbersTilerError("No bands nor expression given")
if tile is None or mask is None:
return (
"OK",
f"image/png",
b'',
)
rtile, rmask = _postprocess(tile,
mask,
rescale=None,
color_formula=color_formula)
if color_map:
color_map = get_colormap(color_map, format="gdal")
options = img_profiles.get(driver, {})
return (
"OK",
f"image/{ext}",
array_to_image(rtile,
rmask,
img_format=driver,
color_map=color_map,
**options),
)
def test_array_to_image_valid_colormapDict():
"""Create 'colormaped' PNG image buffer from one band array using discrete cmap."""
arr = np.random.randint(0, 255, size=(1, 512, 512), dtype=np.uint8)
cmap = {
1: [255, 255, 255],
50: [255, 255, 0],
100: [255, 0, 0],
150: [0, 0, 255]
}
assert utils.array_to_image(arr, color_map=cmap)
def tile(
scene,
z,
x,
y,
scale=1,
ext="png",
bands=None,
expr=None,
rescale=None,
color_formula=None,
color_map=None,
):
"""Handle tile requests."""
if ext == "jpg":
driver = "jpeg"
elif ext == "jp2":
driver = "JP2OpenJPEG"
else:
driver = ext
if bands and expr:
raise CbersTilerError("Cannot pass bands and expression")
if not bands and not expr:
raise CbersTilerError("Need bands or expression")
if bands:
bands = tuple(bands.split(","))
tilesize = scale * 256
if expr is not None:
tile, mask = expression(scene, x, y, z, expr, tilesize=tilesize)
elif bands is not None:
tile, mask = cbers.tile(scene, x, y, z, bands=bands, tilesize=tilesize)
rtile, rmask = _postprocess(tile,
mask,
tilesize,
rescale=rescale,
color_formula=color_formula)
if color_map:
color_map = get_colormap(color_map, format="gdal")
options = img_profiles.get(driver, {})
return (
"OK",
f"image/{ext}",
array_to_image(rtile,
rmask,
img_format=driver,
color_map=color_map,
**options),
)
def tile(
z: int,
x: int,
y: int,
scale: int = 1,
ext: str = None,
url: str = None,
indexes: Union[str, Tuple[int]] = None,
expr: str = None,
nodata: Union[str, int, float] = None,
rescale: str = None,
color_formula: str = None,
color_map: str = None,
) -> Tuple[str, str, BinaryIO]:
"""Handle tile requests."""
driver = "jpeg" if ext == "jpg" else ext
if indexes and expr:
raise TilerError("Cannot pass indexes and expression")
if not url:
raise TilerError("Missing 'url' parameter")
if isinstance(indexes, str):
indexes = tuple(int(s) for s in re.findall(r"\d+", indexes))
if nodata is not None:
nodata = numpy.nan if nodata == "nan" else float(nodata)
tilesize = scale * 256
if expr is not None:
tile, mask = expression(
url, x, y, z, expr=expr, tilesize=tilesize, nodata=nodata
)
else:
tile, mask = main.tile(
url, x, y, z, indexes=indexes, tilesize=tilesize, nodata=nodata
)
rtile, rmask = _postprocess(
tile, mask, rescale=rescale, color_formula=color_formula
)
if color_map:
color_map = get_colormap(color_map, format="gdal")
options = img_profiles.get(driver, {})
return (
"OK",
f"image/{ext}",
array_to_image(rtile, rmask, img_format=driver, color_map=color_map, **options),
)
def create_tile(src, x, y, z, style, bands=None):
"""Create the tile for x,y,z
Parameters
----------
src : string
The connection to the source data.
Accepted protocols are s3, https and local files.
x : int
Mercator tile X index.
y : int
Mercator tile Y index.
z : int
Mecator tile zoom level.
style : Style object
Used to style the tile.
bands : int or list of type 'int'
When querying a source with multiple bands, selects the band to use.
Returns
-------
bytes
The png image as bytes.
"""
try:
# returns the tile at the point as well as a mask to for the undefined values
indexes = bands
resample = style.get_resampling_method()
tile, alpha = main.tile(src,
x,
y,
z,
indexes=indexes,
resampling_method=resample)
alpha = style.style_tile_mask(tile, alpha)
png_tile = style.normalise_tile(tile)
except Exception as exception:
print('tile generation exception')
print(exception)
traceback.print_exc(file=sys.stdout)
# Return empty tile
png_tile = np.full(256, 3)
colour_map = style.get_colour_map_array()
return array_to_image(png_tile, color_map=colour_map, mask=alpha)
def tile(b64url, x, y, z):
url = str(base64.b64decode(b64url).decode('utf-8'))
app.logger.debug(f"Getting tile z {z} x {x} y {y} at url {url}")
try:
tile, mask = main.tile(url, int(x), int(y), int(z), tilesize=256)
except TileOutsideBounds as e:
app.logger.debug("Tile out of bounds")
return abort(404)
_buffer = array_to_image(tile,
mask=mask,
img_format="png",
**image_options)
del tile, mask
return send_file(io.BytesIO(_buffer),
mimetype='image/png',
as_attachment=False,
attachment_filename='tile.jpg')
def s1tile(
scene: str,
z: int,
x: int,
y: int,
scale: int = 1,
ext: str = "png",
bands: str = None,
rescale: str = None,
color_formula: str = None,
color_map: str = None,
) -> Tuple[str, str, BinaryIO]:
"""Handle tile requests."""
if not bands:
raise Exception("bands is required")
tilesize = scale * 256
tile, mask = sentinel1.tile(scene,
x,
y,
z,
bands=tuple(bands.split(",")),
tilesize=tilesize)
rtile, rmask = _postprocess(tile,
mask,
rescale=rescale,
color_formula=color_formula)
if color_map:
color_map = get_colormap(color_map, format="gdal")
driver = "jpeg" if ext == "jpg" else ext
options = img_profiles.get(driver, {})
return (
"OK",
f"image/{ext}",
array_to_image(rtile,
rmask,
img_format=driver,
color_map=color_map,
**options),
)
def _get_tile(self, z, x, y, tileformat, color_ops=None):
if tileformat == "jpg":
tileformat = "jpeg"
if not self.raster.tile_exists(z, x, y):
raise web.HTTPError(404)
data, mask = self.raster.read_tile(z, x, y)
if len(data.shape) == 2:
data = numpy.expand_dims(data, axis=0)
if self.scale:
nbands = data.shape[0]
scale = self.scale
if len(scale) != nbands:
scale = scale * nbands
for bdx in range(nbands):
data[bdx] = numpy.where(
mask,
linear_rescale(data[bdx],
in_range=scale[bdx],
out_range=[0, 255]),
0,
)
data = data.astype(numpy.uint8)
if color_ops:
data = self._apply_color_operations(data, color_ops)
options = img_profiles.get(tileformat, {})
return BytesIO(
array_to_image(data,
mask=mask,
color_map=self.colormap,
img_format=tileformat,
**options))
async def tile(
z: int,
x: int,
y: int,
ext: str = Path(..., regex="^(png)|(jpg)|(webp)$"),
scale: int = 1,
indexes: str = Query(None, title="Coma (',') delimited band indexes"),
rescale: str = Query(None, title="Coma (',') delimited Min,Max bounds"),
color_formula: str = Query(None, title="rio-color formula"),
color_map: str = Query(None, title="rio-tiler color map names"),
resampling_method: str = Query("bilinear", title="rasterio resampling"),
):
"""Handle /tiles requests."""
if isinstance(indexes, str):
indexes = tuple(int(s) for s in re.findall(r"\d+", indexes))
tilesize = scale * 256
tile, mask = self.raster.read_tile(
z,
x,
y,
tilesize=tilesize,
indexes=indexes,
resampling_method=resampling_method,
)
rtile, _ = postprocess_tile(
tile, mask, rescale=rescale, color_formula=color_formula
)
if color_map:
color_map = get_colormap(color_map, format="gdal")
driver = "jpeg" if ext == "jpg" else ext
options = img_profiles.get(driver, {})
img = array_to_image(
rtile, mask, img_format=driver, color_map=color_map, **options
)
return TileResponse(img, media_type=f"image/{ext}")
def test_array_to_image_valid_colormap():
"""Creates 'colormaped' PNG image buffer from one band array."""
arr = np.random.randint(0, 255, size=(1, 512, 512), dtype=np.uint8)
cmap = utils.get_colormap(name="cfastie", format="gdal")
assert utils.array_to_image(arr, color_map=cmap)
def test_array_to_image_valid_mask():
"""Creates image buffer from 3 bands array and mask."""
arr = np.random.randint(0, 255, size=(3, 512, 512), dtype=np.uint8)
mask = np.zeros((512, 512), dtype=np.uint8)
assert utils.array_to_image(arr, mask=mask)
assert utils.array_to_image(arr, mask=mask, img_format="jpeg")
def get(self,
request,
pk=None,
project_pk=None,
tile_type="",
z="",
x="",
y="",
scale=1):
"""
Get a tile image
"""
task = self.get_and_check_task(request, pk)
z = int(z)
x = int(x)
y = int(y)
if x == 0 and y == 0 and z == 0:
raise exceptions.NotFound()
scale = int(scale)
ext = "png"
driver = "jpeg" if ext == "jpg" else ext
indexes = None
nodata = None
formula = self.request.query_params.get('formula')
bands = self.request.query_params.get('bands')
rescale = self.request.query_params.get('rescale')
color_map = self.request.query_params.get('color_map')
hillshade = self.request.query_params.get('hillshade')
if formula == '': formula = None
if bands == '': bands = None
if rescale == '': rescale = None
if color_map == '': color_map = None
if hillshade == '' or hillshade == '0': hillshade = None
try:
expr, _ = lookup_formula(formula, bands)
except ValueError as e:
raise exceptions.ValidationError(str(e))
if tile_type in ['dsm', 'dtm'] and rescale is None:
rescale = "0,1000"
if tile_type in ['dsm', 'dtm'] and color_map is None:
color_map = "gray"
if tile_type == 'orthophoto' and formula is not None:
if color_map is None:
color_map = "gray"
if rescale is None:
rescale = "-1,1"
if nodata is not None:
nodata = np.nan if nodata == "nan" else float(nodata)
tilesize = scale * 256
url = get_raster_path(task, tile_type)
if not os.path.isfile(url):
raise exceptions.NotFound()
try:
if expr is not None:
tile, mask = expression(url,
x,
y,
z,
expr=expr,
tilesize=tilesize,
nodata=nodata)
else:
tile, mask = main.tile(url,
x,
y,
z,
indexes=indexes,
tilesize=tilesize,
nodata=nodata)
except TileOutsideBounds:
raise exceptions.NotFound("Outside of bounds")
# Use alpha channel for transparency, don't use the mask if one is provided (redundant)
if tile.shape[0] == 4:
mask = None
if color_map:
try:
color_map = get_colormap(color_map, format="gdal")
except FileNotFoundError:
raise exceptions.ValidationError("Not a valid color_map value")
intensity = None
if hillshade is not None:
try:
hillshade = float(hillshade)
if hillshade <= 0:
hillshade = 1.0
print(hillshade)
except ValueError:
raise exceptions.ValidationError("Invalid hillshade value")
if tile.shape[0] != 1:
raise exceptions.ValidationError(
"Cannot compute hillshade of non-elevation raster (multiple bands found)"
)
with rasterio.open(url) as src:
minzoom, maxzoom = get_zooms(src)
z_value = min(maxzoom, max(z, minzoom))
delta_scale = (maxzoom + 1 - z_value) * 4
dx = src.meta["transform"][0] * delta_scale
dy = -src.meta["transform"][4] * delta_scale
ls = LightSource(azdeg=315, altdeg=45)
# Hillshading is not a local tile operation and
# requires neighbor tiles to be rendered seamlessly
elevation = get_elevation_tiles(tile[0], url, x, y, z, tilesize,
nodata)
intensity = ls.hillshade(elevation,
dx=dx,
dy=dy,
vert_exag=hillshade)
intensity = intensity[tilesize:tilesize * 2, tilesize:tilesize * 2]
rgb, rmask = rescale_tile(tile, mask, rescale=rescale)
rgb = apply_colormap(rgb, color_map)
if intensity is not None:
# Quick check
if rgb.shape[0] != 3:
raise exceptions.ValidationError(
"Cannot process tile: intensity image provided, but no RGB data was computed."
)
intensity = intensity * 255.0
rgb = hsv_blend(rgb, intensity)
options = img_profiles.get(driver, {})
return HttpResponse(array_to_image(rgb,
rmask,
img_format=driver,
**options),
content_type="image/{}".format(ext))
def test_array_to_image_valid_1band():
"""Creates PNG image buffer from one band array."""
arr = np.random.randint(0, 255, size=(512, 512), dtype=np.uint8)
assert utils.array_to_image(arr)
def _img(
mosaicid: str = None,
z: int = None,
x: int = None,
y: int = None,
scale: int = 1,
ext: str = None,
url: str = None,
indexes: str = None,
rescale: str = None,
color_ops: str = None,
color_map: str = None,
pixel_selection: str = "first",
resampling_method: str = "nearest",
) -> Tuple[str, str, BinaryIO]:
"""Handle tile requests."""
if mosaicid:
url = _create_path(mosaicid)
elif url is None:
return ("NOK", "text/plain", "Missing 'URL' parameter")
assets = fetch_and_find_assets(url, x, y, z)
if not assets:
return ("EMPTY", "text/plain", f"No assets found for tile {z}-{x}-{y}")
if indexes:
indexes = list(map(int, indexes.split(",")))
tilesize = 256 * scale
if pixel_selection == "last":
pixel_selection = "first"
assets = list(reversed(assets))
with rasterio.Env(aws_session):
pixsel_method = PIXSEL_METHODS[pixel_selection]
tile, mask = mosaic_tiler(
assets,
x,
y,
z,
cogeoTiler,
indexes=indexes,
tilesize=tilesize,
pixel_selection=pixsel_method(),
resampling_method=resampling_method,
)
if tile is None:
return ("EMPTY", "text/plain", "empty tiles")
rtile = _postprocess(tile, mask, rescale=rescale, color_formula=color_ops)
if color_map:
if color_map.startswith("custom_"):
color_map = get_custom_cmap(color_map)
else:
color_map = get_colormap(color_map, format="gdal")
if not ext:
ext = "jpg" if mask.all() else "png"
driver = "jpeg" if ext == "jpg" else ext
options = img_profiles.get(driver, {})
if ext == "tif":
ext = "tiff"
driver = "GTiff"
tile_bounds = mercantile.xy_bounds(mercantile.Tile(x=x, y=y, z=z))
options = dict(
crs={"init": "EPSG:3857"},
transform=from_bounds(*tile_bounds, tilesize, tilesize),
)
return (
"OK",
f"image/{ext}",
array_to_image(rtile,
mask,
img_format=driver,
color_map=color_map,
**options),
)
def handler(event, context, invoke_local=False): # pylint: disable=unused-argument
"""The lambda handler for generating a tile
Parameters
----------
event : object
The event passed from the API Gateway to the lambda function.
context : object
The context passed from the API Gateway to the lambda function.
invoke_local : bool
A flag to tell whether this was invoked locally.
Returns
-------
object
A lambda response to api gateway.
"""
# Get path parameters
data = event['pathParameters']['data']
x_index = int(event['pathParameters']['x'])
y_index = int(event['pathParameters']['y'].strip('.png'))
zoom_index = int(event['pathParameters']['z'])
bucket = os.environ['tileBucket']
data_config = get_stac_config(data)
if 'style' in event['pathParameters'] and event['pathParameters'][
'style'] != 'default':
style_id = event['pathParameters']['style']
style = get_style(data, style_id, bucket, data_config['style_indexes'])
output_file = f"{data_config['output_prefix']}/styles/{style_id}/{zoom_index}/{x_index}/{y_index}.png"
else:
style = get_style(data, 'default', bucket)
output_file = f"{data_config['output_prefix']}/{zoom_index}/{x_index}/{y_index}.png"
try:
if 'style' in event['pathParameters'] and event['pathParameters'][
'style'] != 'default':
style_id = event['pathParameters']['style']
style = get_style(data, style_id, bucket,
data_config['style_indexes'])
output_file = f"{data_config['output_prefix']}/styles/{style_id}/{zoom_index}/{x_index}/{y_index}.png"
else:
style = get_style(data, 'default', bucket)
output_file = f"{data_config['output_prefix']}/{zoom_index}/{x_index}/{y_index}.png"
bands = data_config.get('band', [1])
tile = create_tile(data_config['source'],
x_index,
y_index,
zoom_index,
style,
bands=bands)
except Exception as e:
print(e)
# return {
# 'statusCode': '404',
# 'headers': {}
# }
# Create empty 1x1 transparent is png
tile_init = np.full((1, 1, 1), 0, dtype=np.uint8)
mask = np.full((1, 1), 0, dtype=np.uint8)
tile = array_to_image(tile_init, mask=mask)
if invoke_local:
# If localally invoked save the tile to disk
filepath = f"data/{output_file}"
os.makedirs(os.path.dirname(filepath), exist_ok=True)
with open(filepath, "wb") as binary_png:
print(f"Generated: {filepath}")
binary_png.write(tile)
else:
# save the tile to s3
try:
s3 = boto3.resource('s3')
s3object = s3.Object(bucket, output_file)
s3object.put(Body=tile)
except Exception as e:
# Log error but still return tile.
print('failed to save to s3 tile cache')
print(e)
return {
'statusCode': "200",
'headers': {
'Content-Type': 'image/png'
},
'body': base64.b64encode(tile).decode('utf-8'),
'isBase64Encoded': True
}
def get(self,
request,
pk=None,
project_pk=None,
tile_type="",
z="",
x="",
y="",
scale=1):
"""
Get a tile image
"""
task = self.get_and_check_task(request, pk)
z = int(z)
x = int(x)
y = int(y)
scale = int(scale)
ext = "png"
driver = "jpeg" if ext == "jpg" else ext
indexes = None
nodata = None
formula = self.request.query_params.get('formula')
bands = self.request.query_params.get('bands')
rescale = self.request.query_params.get('rescale')
color_map = self.request.query_params.get('color_map')
hillshade = self.request.query_params.get('hillshade')
if formula == '': formula = None
if bands == '': bands = None
if rescale == '': rescale = None
if color_map == '': color_map = None
if hillshade == '' or hillshade == '0': hillshade = None
try:
expr, _ = lookup_formula(formula, bands)
except ValueError as e:
raise exceptions.ValidationError(str(e))
if tile_type in ['dsm', 'dtm'] and rescale is None:
rescale = "0,1000"
if tile_type in ['dsm', 'dtm'] and color_map is None:
color_map = "gray"
if tile_type == 'orthophoto' and formula is not None:
if color_map is None:
color_map = "gray"
if rescale is None:
rescale = "-1,1"
if nodata is not None:
nodata = np.nan if nodata == "nan" else float(nodata)
tilesize = scale * 256
url = get_raster_path(task, tile_type)
if not os.path.isfile(url):
raise exceptions.NotFound()
with rasterio.open(url) as src:
minzoom, maxzoom = get_zoom_safe(src)
has_alpha = has_alpha_band(src)
if z < minzoom - ZOOM_EXTRA_LEVELS or z > maxzoom + ZOOM_EXTRA_LEVELS:
raise exceptions.NotFound()
# Handle N-bands datasets for orthophotos (not plant health)
if tile_type == 'orthophoto' and expr is None:
ci = src.colorinterp
# More than 4 bands?
if len(ci) > 4:
# Try to find RGBA band order
if ColorInterp.red in ci and \
ColorInterp.green in ci and \
ColorInterp.blue in ci:
indexes = (
ci.index(ColorInterp.red) + 1,
ci.index(ColorInterp.green) + 1,
ci.index(ColorInterp.blue) + 1,
)
else:
# Fallback to first three
indexes = (
1,
2,
3,
)
elif has_alpha:
indexes = non_alpha_indexes(src)
resampling = "nearest"
padding = 0
if tile_type in ["dsm", "dtm"]:
resampling = "bilinear"
padding = 16
try:
if expr is not None:
tile, mask = expression(url,
x,
y,
z,
expr=expr,
tilesize=tilesize,
nodata=nodata,
tile_edge_padding=padding,
resampling_method=resampling)
else:
tile, mask = main.tile(url,
x,
y,
z,
indexes=indexes,
tilesize=tilesize,
nodata=nodata,
tile_edge_padding=padding,
resampling_method=resampling)
except TileOutsideBounds:
raise exceptions.NotFound("Outside of bounds")
if color_map:
try:
color_map = get_colormap(color_map, format="gdal")
except FileNotFoundError:
raise exceptions.ValidationError("Not a valid color_map value")
intensity = None
if hillshade is not None:
try:
hillshade = float(hillshade)
if hillshade <= 0:
hillshade = 1.0
except ValueError:
raise exceptions.ValidationError("Invalid hillshade value")
if tile.shape[0] != 1:
raise exceptions.ValidationError(
"Cannot compute hillshade of non-elevation raster (multiple bands found)"
)
delta_scale = (maxzoom + ZOOM_EXTRA_LEVELS + 1 - z) * 4
dx = src.meta["transform"][0] * delta_scale
dy = -src.meta["transform"][4] * delta_scale
ls = LightSource(azdeg=315, altdeg=45)
# Hillshading is not a local tile operation and
# requires neighbor tiles to be rendered seamlessly
elevation = get_elevation_tiles(tile[0], url, x, y, z, tilesize,
nodata, resampling, padding)
intensity = ls.hillshade(elevation,
dx=dx,
dy=dy,
vert_exag=hillshade)
intensity = intensity[tilesize:tilesize * 2, tilesize:tilesize * 2]
rgb, rmask = rescale_tile(tile, mask, rescale=rescale)
rgb = apply_colormap(rgb, color_map)
if intensity is not None:
# Quick check
if rgb.shape[0] != 3:
raise exceptions.ValidationError(
"Cannot process tile: intensity image provided, but no RGB data was computed."
)
intensity = intensity * 255.0
rgb = hsv_blend(rgb, intensity)
options = img_profiles.get(driver, {})
return HttpResponse(array_to_image(rgb,
rmask,
img_format=driver,
**options),
content_type="image/{}".format(ext))
def test_array_to_image_valid_1bandWebp():
"""Creates WEBP image buffer from 1 band array."""
arr = np.random.randint(0, 255, size=(1, 512, 512), dtype=np.uint8)
assert utils.array_to_image(arr, img_format="WEBP")
def test_array_to_image_valid_options():
"""Creates image buffer with driver options."""
arr = np.random.randint(0, 255, size=(3, 512, 512), dtype=np.uint8)
mask = np.zeros((512, 512), dtype=np.uint8) + 255
assert utils.array_to_image(arr, mask=mask, img_format="png", ZLEVEL=9)
def test_array_to_image_geotiff():
"""Creates GeoTIFF image buffer from 3 bands array."""
arr = np.random.randint(0, 255, size=(3, 512, 512), dtype=np.uint8)
mask = np.zeros((512, 512), dtype=np.uint8) + 255
assert utils.array_to_image(arr, mask=mask, img_format="GTiff")
def tiles(
z,
x,
y,
scale=1,
ext="png",
url=None,
nodata=None,
indexes=None,
rescale=None,
color_ops=None,
color_map=None,
dem=None,
):
"""
Handle Raster /tiles requests.
Note: All the querystring parameters are translated to function keywords
and passed as string value by lambda_proxy
Attributes
----------
z : int, required
Mercator tile ZOOM level.
x : int, required
Mercator tile X index.
y : int, required
Mercator tile Y index.
scale : int
Output scale factor (default: 1).
ext : str
Image format to return (default: png).
url : str, required
Dataset url to read from.
indexes : str, optional, (defaults: None)
Comma separated band index number (e.g "1,2,3").
nodata, str, optional
Custom nodata value if not preset in dataset.
rescale : str, optional
Min and Max data bounds to rescale data from.
color_ops : str, optional
rio-color compatible color formula
color_map : str, optional
Rio-tiler compatible colormap name ("cfastie" or "schwarzwald")
dem : str, optional
Create Mapbox or Mapzen RGBA encoded elevation image
Returns
-------
status : str
Status of the request (e.g. OK, NOK).
MIME type : str
response body MIME type (e.g. image/jpeg).
body : bytes
Image body.
"""
if not url:
raise TilerError("Missing 'url' parameter")
if indexes:
indexes = tuple(int(s) for s in re.findall(r"\d+", indexes))
if nodata is not None and isinstance(nodata, str):
nodata = numpy.nan if nodata == "nan" else float(nodata)
tilesize = 256 * scale
tile, mask = main.tile(url,
x,
y,
z,
indexes=indexes,
tilesize=tilesize,
nodata=nodata)
if dem:
if dem == "mapbox":
tile = encoders.data_to_rgb(tile, -10000, 1)
elif dem == "mapzen":
tile = mapzen_elevation_rgb.data_to_rgb(tile)
else:
return ("NOK", "text/plain", 'Invalid "dem" mode')
else:
rtile, rmask = _postprocess_tile(tile,
mask,
rescale=rescale,
color_ops=color_ops)
if color_map:
color_map = get_colormap(color_map, format="gdal")
driver = "jpeg" if ext == "jpg" else ext
options = img_profiles.get(driver, {})
return (
"OK",
f"image/{ext}",
array_to_image(rtile,
rmask,
img_format=driver,
color_map=color_map,
**options),
)
def tile(
z,
x,
y,
scale=1,
ext="png",
url=None,
indexes=None,
expr=None,
nodata=None,
rescale=None,
color_formula=None,
color_map=None,
dem=None,
):
"""Handle tile requests."""
if ext == "jpg":
driver = "jpeg"
elif ext == "jp2":
driver = "JP2OpenJPEG"
else:
driver = ext
if indexes and expr:
raise TilerError("Cannot pass indexes and expression")
if not url:
raise TilerError("Missing 'url' parameter")
if indexes:
indexes = tuple(int(s) for s in re.findall(r"\d+", indexes))
tilesize = scale * 256
if nodata is not None:
nodata = numpy.nan if nodata == "nan" else float(nodata)
if expr is not None:
tile, mask = expression(url, x, y, z, expr, tilesize=tilesize)
else:
tile, mask = main.tile(url,
x,
y,
z,
indexes=indexes,
tilesize=tilesize)
if dem:
if dem == "mapbox":
tile = encoders.data_to_rgb(tile, -10000, 1)
elif dem == "mapzen":
tile = mapzen_elevation_rgb.data_to_rgb(tile)
else:
return ("NOK", "text/plain", 'Invalid "dem" mode')
else:
rtile, rmask = _postprocess(tile,
mask,
tilesize,
rescale=rescale,
color_formula=color_formula)
if color_map:
color_map = get_colormap(color_map, format="gdal")
options = img_profiles.get(driver, {})
return (
"OK",
f"image/{ext}",
array_to_image(rtile,
rmask,
img_format=driver,
color_map=color_map,
**options),
)
def mosaic_tiles(
z,
x,
y,
scale=1,
ext="png",
urls=None,
nodata=None,
indexes=None,
rescale=None,
color_ops=None,
color_map=None,
pixel_selection: str = "first",
resampling_method: str = "bilinear",
):
"""
Handle Raster /mosaics requests.
Note: All the querystring parameters are translated to function keywords
and passed as string value by lambda_proxy
Attributes
----------
z : int, required
Mercator tile ZOOM level.
x : int, required
Mercator tile X index.
y : int, required
Mercator tile Y index.
scale : int
Output scale factor (default: 1).
ext : str
Image format to return (default: png).
urls : str, required
Dataset urls to read from.
indexes : str, optional, (defaults: None)
Comma separated band index number (e.g "1,2,3").
nodata, str, optional
Custom nodata value if not preset in dataset.
rescale : str, optional
Min and Max data bounds to rescale data from.
color_ops : str, optional
rio-color compatible color formula
color_map : str, optional
Rio-tiler compatible colormap name ("cfastie" or "schwarzwald")
pixel_selection : str, optional
rio-tiler-mosaic pixel selection method (default: first)
resampling_method : str, optional
Resampling method to use (default: bilinear)
Returns
-------
status : str
Status of the request (e.g. OK, NOK).
MIME type : str
response body MIME type (e.g. image/jpeg).
body : bytes
Image body.
"""
if not urls:
raise TilerError("Missing 'urls' parameter")
if indexes:
indexes = tuple(int(s) for s in re.findall(r"\d+", indexes))
if nodata is not None and isinstance(nodata, str):
nodata = numpy.nan if nodata == "nan" else float(nodata)
tilesize = 256 * scale
tile, mask = mosaic_tiler(
urls.split(","),
x,
y,
z,
main.tile,
indexes=indexes,
tilesize=tilesize,
nodata=nodata,
pixel_selection=pixel_selection,
resampling_method=resampling_method,
)
if tile is None:
return ("EMPTY", "text/plain", "empty tiles")
rtile, rmask = _postprocess_tile(tile,
mask,
rescale=rescale,
color_ops=color_ops)
if color_map:
color_map = get_colormap(color_map, format="gdal")
driver = "jpeg" if ext == "jpg" else ext
options = img_profiles.get(driver, {})
return (
"OK",
f"image/{ext}",
array_to_image(rtile,
rmask,
img_format=driver,
color_map=color_map,
**options),
)
def tile_handler(
z: int,
x: int,
y: int,
scale: int = 1,
ext: str = None,
url: str = None,
indexes: Union[str, Tuple[int]] = None,
expr: str = None,
nodata: Union[str, int, float] = None,
rescale: str = None,
color_formula: str = None,
color_map: str = None,
) -> Tuple[str, str, BinaryIO]:
"""Handle /tiles requests."""
if indexes and expr:
raise TilerError("Cannot pass indexes and expression")
if not url:
raise TilerError("Missing 'url' parameter")
if isinstance(indexes, str):
indexes = tuple(int(s) for s in re.findall(r"\d+", indexes))
if nodata is not None:
nodata = numpy.nan if nodata == "nan" else float(nodata)
tilesize = scale * 256
if expr is not None:
tile, mask = expression(
url, x, y, z, expr=expr, tilesize=tilesize, nodata=nodata
)
else:
tile, mask = cogTiler.tile(
url, x, y, z, indexes=indexes, tilesize=tilesize, nodata=nodata
)
if not ext:
ext = "jpg" if mask.all() else "png"
rtile, rmask = _postprocess(
tile, mask, rescale=rescale, color_formula=color_formula
)
if color_map:
color_map = get_colormap(color_map, format="gdal")
if ext == "jpg":
driver = "jpeg"
elif ext == "tif":
driver = "GTiff"
else:
driver = ext
options = img_profiles.get(driver, {})
if driver == "GTiff":
mercator_tile = mercantile.Tile(x=x, y=y, z=z)
bounds = mercantile.xy_bounds(mercator_tile)
w, s, e, n = bounds
dst_transform = from_bounds(w, s, e, n, rtile.shape[1], rtile.shape[2])
options = dict(
dtype=rtile.dtype, crs={"init": "EPSG:3857"}, transform=dst_transform
)
return (
"OK",
f"image/{ext}",
array_to_image(rtile, rmask, img_format=driver, color_map=color_map, **options),
)
def tiles(
mosaicid: str,
z: int,
x: int,
y: int,
scale: int = 1,
ext: str = "png",
bands: str = None,
expr: str = None,
rescale: str = None,
color_ops: str = None,
color_map: str = None,
pixel_selection: str = "first",
) -> Tuple[str, str, BinaryIO]:
"""Handle tile requests."""
bucket = os.environ["MOSAIC_DEF_BUCKET"]
url = f"s3://{bucket}/mosaics/{mosaicid}.json.gz"
assets = get_assets(url, x, y, z)
if not assets:
return ("EMPTY", "text/plain", f"No assets found for tile {z}-{x}-{y}")
tilesize = 256 * scale
pixel_selection = pixSel[pixel_selection]
if expr is not None:
tile, mask = mosaic_tiler(
assets,
x,
y,
z,
expressionTiler,
pixel_selection=pixel_selection(),
expr=expr,
tilesize=tilesize,
)
elif bands is not None:
tile, mask = mosaic_tiler(
assets,
x,
y,
z,
landsatTiler,
pixel_selection=pixel_selection(),
bands=tuple(bands.split(",")),
tilesize=tilesize,
)
else:
return ("NOK", "text/plain", "No bands nor expression given")
if tile is None:
return ("EMPTY", "text/plain", "empty tiles")
if color_map:
color_map = get_colormap(color_map, format="gdal")
if ext == "gif":
frames = []
options = img_profiles.get("png", {})
for i in range(len(tile)):
img = post_process_tile(tile[i].copy(),
mask[i].copy(),
rescale=rescale,
color_formula=color_ops)
frames.append(
Image.open(
io.BytesIO(
array_to_image(
img,
mask[i],
img_format="png",
color_map=color_map,
**options,
))))
sio = io.BytesIO()
frames[0].save(
sio,
"gif",
save_all=True,
append_images=frames[1:],
duration=300,
loop=0,
optimize=True,
)
sio.seek(0)
return ("OK", f"image/{ext}", sio.getvalue())
rtile = post_process_tile(tile,
mask,
rescale=rescale,
color_formula=color_ops)
driver = "jpeg" if ext == "jpg" else ext
options = img_profiles.get(driver, {})
if ext == "tif":
ext = "tiff"
driver = "GTiff"
tile_bounds = mercantile.xy_bounds(mercantile.Tile(x=x, y=y, z=z))
options = dict(
crs={"init": "EPSG:3857"},
transform=from_bounds(*tile_bounds, tilesize, tilesize),
)
return (
"OK",
f"image/{ext}",
array_to_image(rtile,
mask,
img_format=driver,
color_map=color_map,
**options),
)
