dependencies

titiler.core.dependencies

Common dependency.

AssetsExprParams dataclass

Bases: ExpressionParams, AssetsParams

Assets and Expression parameters.

Source code in src/titiler/core/titiler/core/dependencies.py

@dataclass
class AssetsExprParams(ExpressionParams, AssetsParams):
    """Assets and Expression parameters."""

    asset_as_band: Annotated[
        bool | None,
        Query(
            title="Consider asset as a 1 band dataset",
            description="Asset as Band",
        ),
    ] = None

AssetsParams dataclass

Bases: DefaultDependency

Assets parameters.

Source code in src/titiler/core/titiler/core/dependencies.py

@dataclass
class AssetsParams(DefaultDependency):
    """Assets parameters."""

    assets: Annotated[
        list[str],
        AfterValidator(_parse_asset),
        Query(
            title="Asset names",
            description="Asset's names.",
            openapi_examples={
                "user-provided": {"value": None},
                "one-asset": {
                    "description": "Return results for asset `data`.",
                    "value": ["data"],
                },
                "multi-assets": {
                    "description": "Return results for assets `data` and `cog`.",
                    "value": ["data", "cog"],
                },
                "multi-assets-with-options": {
                    "description": "Return results for assets `data` and `cog`.",
                    "value": ["data|bidx=1", "cog|bidx=1,2"],
                },
            },
        ),
    ]

BidxExprParams dataclass

Bases: ExpressionParams, BidxParams

Band Indexes and Expression parameters.

Source code in src/titiler/core/titiler/core/dependencies.py

@dataclass
class BidxExprParams(ExpressionParams, BidxParams):
    """Band Indexes and Expression parameters."""

    pass

BidxParams dataclass

Bases: DefaultDependency

Band Indexes parameters.

Source code in src/titiler/core/titiler/core/dependencies.py

@dataclass
class BidxParams(DefaultDependency):
    """Band Indexes parameters."""

    indexes: Annotated[
        list[int] | None,
        Query(
            title="Band indexes",
            alias="bidx",
            description="Dataset band indexes",
            openapi_examples={
                "user-provided": {"value": None},
                "one-band": {"value": [1]},
                "multi-bands": {"value": [1, 2, 3]},
            },
        ),
    ] = None

DatasetParams dataclass

Bases: DefaultDependency

Low level WarpedVRT Optional parameters.

Source code in src/titiler/core/titiler/core/dependencies.py

@dataclass
class DatasetParams(DefaultDependency):
    """Low level WarpedVRT Optional parameters."""

    nodata: Annotated[
        Literal["nan", "inf", "-inf"] | int | float | None,
        Query(
            title="Nodata value",
            description="Overwrite internal Nodata value; nan or valid float values only.",
        ),
    ] = None
    unscale: Annotated[
        bool | None,
        Query(
            title="Apply internal Scale/Offset",
            description="Apply internal Scale/Offset. Defaults to `False`.",
        ),
    ] = None
    resampling_method: Annotated[
        RIOResampling | None,
        Query(
            alias="resampling",
            description="RasterIO resampling algorithm. Defaults to `nearest`.",
        ),
    ] = None
    reproject_method: Annotated[
        WarpResampling | None,
        Query(
            alias="reproject",
            description="WarpKernel resampling algorithm (only used when doing re-projection). Defaults to `nearest`.",
        ),
    ] = None

    def __post_init__(self):
        """Post Init."""
        if self.nodata is not None:
            self.nodata = numpy.nan if self.nodata == "nan" else float(self.nodata)

        if self.unscale is not None:
            self.unscale = bool(self.unscale)

DefaultDependency dataclass

Dataclass with dict unpacking

Source code in src/titiler/core/titiler/core/dependencies.py

@dataclass
class DefaultDependency:
    """Dataclass with dict unpacking"""

    def as_dict(self, exclude_none: bool = True) -> dict:
        """Transform dataclass to dict."""
        if exclude_none:
            return {k: v for k, v in self.__dict__.items() if v is not None}

        return dict(self.__dict__.items())

as_dict

as_dict(exclude_none: bool = True) -> dict

Transform dataclass to dict.

Source code in src/titiler/core/titiler/core/dependencies.py

def as_dict(self, exclude_none: bool = True) -> dict:
    """Transform dataclass to dict."""
    if exclude_none:
        return {k: v for k, v in self.__dict__.items() if v is not None}

    return dict(self.__dict__.items())

ExpressionParams dataclass

Bases: DefaultDependency

Expression parameters.

Source code in src/titiler/core/titiler/core/dependencies.py

@dataclass
class ExpressionParams(DefaultDependency):
    """Expression parameters."""

    expression: Annotated[
        str | None,
        Query(
            title="Band Math expression",
            description="rio-tiler's band math expression",
            openapi_examples={
                "user-provided": {"value": None},
                "simple": {"description": "Simple band math.", "value": "b1/b2"},
                "multi-bands": {
                    "description": "Semicolon (;) delimited expressions (band1: b1/b2, band2: b2+b3).",
                    "value": "b1/b2;b2+b3",
                },
            },
        ),
    ] = None

HistogramParams dataclass

Bases: DefaultDependency

Numpy Histogram options.

Source code in src/titiler/core/titiler/core/dependencies.py

@dataclass
class HistogramParams(DefaultDependency):
    """Numpy Histogram options."""

    bins: Annotated[
        str | None,
        Query(
            alias="histogram_bins",
            title="Histogram bins.",
            description="""
Defines the number of equal-width bins in the given range (10, by default).

If bins is a sequence (comma `,` delimited values), it defines a monotonically increasing array of bin edges, including the rightmost edge, allowing for non-uniform bin widths.

link: https://numpy.org/doc/stable/reference/generated/numpy.histogram.html
            """,
            openapi_examples={
                "user-provided": {"value": None},
                "simple": {
                    "description": "Defines the number of equal-width bins",
                    "value": 8,
                },
                "array": {
                    "description": "Defines custom bin edges (comma `,` delimited values)",
                    "value": "0,100,200,300",
                },
            },
            pattern=r"^\d+(,\d+)*$",
        ),
    ] = None

    range: Annotated[
        str | None,
        Query(
            alias="histogram_range",
            title="Histogram range",
            description="""
Comma `,` delimited range of the bins.

The lower and upper range of the bins. If not provided, range is simply (a.min(), a.max()).

Values outside the range are ignored. The first element of the range must be less than or equal to the second.
range affects the automatic bin computation as well.

link: https://numpy.org/doc/stable/reference/generated/numpy.histogram.html
            """,
            openapi_examples={
                "user-provided": {"value": None},
                "array": {
                    "description": "Defines custom histogram range (comma `,` delimited values)",
                    "value": "0,1000",
                },
            },
            pattern=separated_parseable_floats_regex(count=2),
        ),
    ] = None

    def __post_init__(self):
        """Post Init."""
        if self.bins:
            bins = self.bins.split(",")
            if len(bins) == 1:
                self.bins = int(bins[0])  # type: ignore
            else:
                self.bins = list(map(float, bins))  # type: ignore
        else:
            self.bins = 10

        if self.range:
            parsed = list(map(float, self.range.split(",")))
            assert (
                len(parsed) == 2
            ), f"Invalid histogram_range values: {self.range}, should be of form 'min,max'"

            self.range = parsed  # type: ignore

ImageRenderingParams dataclass

Bases: RenderingParams

Image Rendering options.

Source code in src/titiler/core/titiler/core/dependencies.py

@dataclass
class ImageRenderingParams(RenderingParams):
    """Image Rendering options."""

    add_mask: Annotated[
        bool | None,
        Query(
            alias="return_mask",
            description="Add mask to the output data. Defaults to `True`",
        ),
    ] = None

OGCMapsParams dataclass

Bases: DefaultDependency

OGC Maps options.

Source code in src/titiler/core/titiler/core/dependencies.py

@dataclass
class OGCMapsParams(DefaultDependency):
    """OGC Maps options."""

    request: Request

    bbox: Annotated[
        str | None,
        BeforeValidator(validate_bbox),
        Query(
            description="Bounding box of the rendered map. The bounding box is provided as four or six coordinates.",
        ),
    ] = None

    crs: Annotated[
        str | None,
        BeforeValidator(validate_crs),
        Query(
            description="Reproject the output to the given crs.",
        ),
    ] = None

    bbox_crs: Annotated[
        str | None,
        BeforeValidator(validate_crs),
        Query(
            description="crs for the specified bbox.",
            alias="bbox-crs",
        ),
    ] = None

    height: Annotated[
        int | None,
        Query(
            description="Height of the map in pixels. If omitted and `width` is specified, defaults to the `height` maintaining a 1:1 aspect ratio. If both `width` and `height` are omitted, the server will select default dimensions.",
            gt=0,
        ),
    ] = None

    width: Annotated[
        int | None,
        Query(
            description="Width of the map in pixels. If omitted and `height` is specified, defaults to the `width` maintaining a 1:1 aspect ratio. If both `width` and `height` are omitted, the server will select default dimensions.",
            gt=0,
        ),
    ] = None

    f: Annotated[
        ImageType | None,
        Query(description="The format of the map response (e.g. png)."),
    ] = None

    max_size: int | None = field(init=False, default=None)

    format: ImageType | None = field(init=False, default=ImageType.png)

    def __post_init__(self):  # noqa: C901
        """Parse and validate."""
        if self.crs:
            self.crs = CRS.from_user_input(self.crs)  # type: ignore

        if self.bbox_crs:
            self.bbox_crs = CRS.from_user_input(self.bbox_crs)  # type: ignore

        if not self.height and not self.width:
            self.max_size = 1024

        if self.bbox:
            bounds = list(map(float, self.bbox.split(",")))
            if len(bounds) == 6:
                bounds = [bounds[0], bounds[1], bounds[3], bounds[4]]

            self.bbox = bounds  # type: ignore

        if self.f:
            self.format = ImageType[self.f]

        else:
            if media := accept_media_type(
                self.request.headers.get("accept", ""),
                [MediaType[e] for e in ImageType],
            ):
                self.format = ImageType[media.name]

PartFeatureParams dataclass

Bases: DefaultDependency

Common parameters for bbox and feature.

Source code in src/titiler/core/titiler/core/dependencies.py

@dataclass
class PartFeatureParams(DefaultDependency):
    """Common parameters for bbox and feature."""

    # NOTE: the part sizes dependency can either be a Query or a Path Parameter
    max_size: Annotated[
        int | None, Field(description="Maximum image size to read onto.")
    ] = None
    height: Annotated[int | None, Field(description="Force output image height.")] = (
        None
    )
    width: Annotated[int | None, Field(description="Force output image width.")] = None

    def __post_init__(self):
        """Post Init."""
        if self.width or self.height:
            self.max_size = None

PreviewParams dataclass

Bases: DefaultDependency

Common Preview parameters.

Source code in src/titiler/core/titiler/core/dependencies.py

@dataclass
class PreviewParams(DefaultDependency):
    """Common Preview parameters."""

    # NOTE: sizes dependency can either be a Query or a Path Parameter
    max_size: Annotated[int, Field(description="Maximum image size to read onto.")] = (
        1024
    )
    height: Annotated[int | None, Field(description="Force output image height.")] = (
        None
    )
    width: Annotated[int | None, Field(description="Force output image width.")] = None

    def __post_init__(self):
        """Post Init."""
        if self.width or self.height:
            self.max_size = None

RenderingParams dataclass

Bases: DefaultDependency

Image Rendering options.

Source code in src/titiler/core/titiler/core/dependencies.py

@dataclass
class RenderingParams(DefaultDependency):
    """Image Rendering options."""

    rescale: Annotated[
        list[str] | None,
        BeforeValidator(validate_rescale),
        Query(
            title="Min/Max data Rescaling",
            description="comma (',') delimited Min,Max range. Can set multiple time for multiple bands.",
            examples=["0,2000", "0,1000", "0,10000"],  # band 1  # band 2  # band 3
        ),
    ] = None

    color_formula: Annotated[
        str | None,
        BeforeValidator(validate_color_formula),
        Query(
            title="Color Formula",
            description="rio-color formula (info: https://github.com/mapbox/rio-color)",
        ),
    ] = None

    def __post_init__(self) -> None:
        """Post Init."""
        if self.rescale:
            rescale_array = []
            for r in self.rescale:
                parsed = tuple(
                    map(
                        float,
                        r.split(","),
                    )
                )
                assert (
                    len(parsed) == 2
                ), f"Invalid rescale values: {self.rescale}, should be of form ['min,max', 'min,max'] or [[min,max], [min, max]]"
                rescale_array.append(parsed)

            self.rescale: RescaleType = rescale_array  # type: ignore

StatisticsParams dataclass

Bases: DefaultDependency

Statistics options.

Source code in src/titiler/core/titiler/core/dependencies.py

@dataclass
class StatisticsParams(DefaultDependency):
    """Statistics options."""

    categorical: Annotated[
        bool | None,
        Query(
            description="Return statistics for categorical dataset. Defaults to `False`"
        ),
    ] = None
    categories: Annotated[
        list[float | int] | None,
        Query(
            alias="c",
            title="Pixels values for categories.",
            description="List of values for which to report counts.",
            examples=[1, 2, 3],
        ),
    ] = None
    percentiles: Annotated[
        list[int] | None,
        Query(
            alias="p",
            title="Percentile values",
            description="List of percentile values (default to [2, 98]).",
            examples=[2, 5, 95, 98],
        ),
    ] = None

    def __post_init__(self):
        """Set percentiles default."""
        if not self.percentiles:
            self.percentiles = [2, 98]

TileParams dataclass

Bases: DefaultDependency

Tile options.

Source code in src/titiler/core/titiler/core/dependencies.py

@dataclass
class TileParams(DefaultDependency):
    """Tile options."""

    buffer: Annotated[
        float | None,
        Query(
            gt=0,
            title="Tile buffer.",
            description="Buffer on each side of the given tile. It must be a multiple of `0.5`. Output **tilesize** will be expanded to `tilesize + 2 * buffer` (e.g 0.5 = 257x257, 1.0 = 258x258).",
        ),
    ] = None

    padding: Annotated[
        int | None,
        Query(
            gt=0,
            title="Tile padding.",
            description="Padding to apply to each tile edge. Helps reduce resampling artefacts along edges. Defaults to `0`.",
        ),
    ] = None

BufferParams

BufferParams(
    buffer: Annotated[
        float | None,
        Query(
            gt=0,
            title="Tile buffer.",
            description="Buffer on each side of the given tile. It must be a multiple of `0.5`. Output **tilesize** will be expanded to `tilesize + 2 * buffer` (e.g 0.5 = 257x257, 1.0 = 258x258).",
        ),
    ] = None,
) -> float | None

Tile buffer Parameter.

Source code in src/titiler/core/titiler/core/dependencies.py

def BufferParams(
    buffer: Annotated[
        float | None,
        Query(
            gt=0,
            title="Tile buffer.",
            description="Buffer on each side of the given tile. It must be a multiple of `0.5`. Output **tilesize** will be expanded to `tilesize + 2 * buffer` (e.g 0.5 = 257x257, 1.0 = 258x258).",
        ),
    ] = None,
) -> float | None:
    """Tile buffer Parameter."""
    return buffer

CRSParams

CRSParams(
    crs: Annotated[
        str | None, BeforeValidator(validate_crs), Query(description="Coordinate Reference System.")
    ] = None,
) -> CRS | None

Coordinate Reference System Coordinates Param.

Source code in src/titiler/core/titiler/core/dependencies.py

def CRSParams(
    crs: Annotated[
        str | None,
        BeforeValidator(validate_crs),
        Query(
            description="Coordinate Reference System.",
        ),
    ] = None,
) -> CRS | None:
    """Coordinate Reference System Coordinates Param."""
    if crs:
        return CRS.from_user_input(crs)

    return None

CoordCRSParams

CoordCRSParams(
    crs: Annotated[
        str | None,
        BeforeValidator(validate_crs),
        Query(
            alias=coord_crs,
            description="Coordinate Reference System of the input coords. Default to `epsg:4326`.",
        ),
    ] = None,
) -> CRS | None

Coordinate Reference System Coordinates Param.

Source code in src/titiler/core/titiler/core/dependencies.py

def CoordCRSParams(
    crs: Annotated[
        str | None,
        BeforeValidator(validate_crs),
        Query(
            alias="coord_crs",
            description="Coordinate Reference System of the input coords. Default to `epsg:4326`.",
        ),
    ] = None,
) -> CRS | None:
    """Coordinate Reference System Coordinates Param."""
    if crs:
        return CRS.from_user_input(crs)

    return None

DatasetPathParams

DatasetPathParams(url: Annotated[str, Query(description='Dataset URL')]) -> str

Create dataset path from args

Source code in src/titiler/core/titiler/core/dependencies.py

def DatasetPathParams(url: Annotated[str, Query(description="Dataset URL")]) -> str:
    """Create dataset path from args"""
    return url

DstCRSParams

DstCRSParams(
    crs: Annotated[
        str | None,
        BeforeValidator(validate_crs),
        Query(alias=dst_crs, description="Output Coordinate Reference System."),
    ] = None,
) -> CRS | None

Coordinate Reference System Coordinates Param.

Source code in src/titiler/core/titiler/core/dependencies.py

def DstCRSParams(
    crs: Annotated[
        str | None,
        BeforeValidator(validate_crs),
        Query(
            alias="dst_crs",
            description="Output Coordinate Reference System.",
        ),
    ] = None,
) -> CRS | None:
    """Coordinate Reference System Coordinates Param."""
    if crs:
        return CRS.from_user_input(crs)

    return None

_parse_asset

_parse_asset(values: list[str]) -> list[AssetType]

Parse assets with optional parameter.

Source code in src/titiler/core/titiler/core/dependencies.py

def _parse_asset(values: list[str]) -> list[AssetType]:
    """Parse assets with optional parameter."""
    assets: list[AssetType] = []
    for v in values:
        if "|" in v:
            asset_name, params = v.split("|", 1)
            opts: dict[str, Any] = {"name": asset_name}
            for option in params.split("|"):
                key, value = option.split("=", 1)
                if key == "bidx":
                    opts["indexes"] = list(map(int, value.split(",")))
                elif key == "expression":
                    opts["expression"] = value
                elif key == "bands":
                    opts["bands"] = value.split(",")

            asset = cast(AssetWithOptions, opts)
            assets.append(asset)
        else:
            assets.append(v)

    return assets

create_colormap_dependency

create_colormap_dependency(cmap: ColorMaps) -> Callable

Create Colormap Dependency.

Source code in src/titiler/core/titiler/core/dependencies.py

def create_colormap_dependency(cmap: ColorMaps) -> Callable:
    """Create Colormap Dependency."""

    def deps(
        colormap_name: Annotated[  # type: ignore
            Literal[tuple(cmap.list())],
            Query(description="Colormap name"),
        ] = None,
        colormap: Annotated[
            str | None, Query(description="JSON encoded custom Colormap")
        ] = None,
    ):
        if colormap_name:
            return cmap.get(colormap_name)

        if colormap:
            try:
                c = json.loads(
                    colormap,
                    object_hook=lambda x: {
                        int(k): parse_color(v) for k, v in x.items()
                    },
                )

                # Make sure to match colormap type
                if isinstance(c, Sequence):
                    c = [(tuple(inter), parse_color(v)) for (inter, v) in c]

                return c
            except json.JSONDecodeError as e:
                raise HTTPException(
                    status_code=400, detail="Could not parse the colormap value."
                ) from e

        return None

    return deps