Modistools

Functionality for downloading MODIS land products subsets.

Fetches data from https://modis.ornl.gov/data/modis_webservice.html using MODISTools as client.

Requires MODISTools. Install with

install.packages("MODISTools")

Use modis_dates(product, lon, lat) to get list of available years.

`Extent`

Bases: BaseModel

Extent to sample.

Attributes:

Name	Type	Description
`horizontal`	`float`	Left right extent to sample in kilometers.
`vertical`	`float`	Above below extent to sample in kilometers.

`ModisSinglePoint`

Bases: Dataset

MODIS land products subsets for single point.

Attributes:

Name	Type	Description
`years`		timerange. For example years=[2000, 2002] downloads data for three years.
`resample`		Resample the dataset to a different time resolution. If None, no resampling.
`point`	`Tuple[float, float]`	provided as a tuple of [longitude, latitude] in WGS84 projection.
`product`	`str`	A MODIS product. Use `modis_products()` to get list of available products.
`bands`	`conset(str, min_items=1)`	MODIS product bands. Use `modis_bands(product)` to get list of available bands for a product.
`extent`	`Extent`	By default a single pixel returned. Give custom extend to get more pixels around point as dictionariy of the form {"horizontal": 12, "vertical": 34}

`download()`

Download the data.

Only downloads if data is not in CONFIG.cache_dir or CONFIG.force_override is TRUE.

`load()`

Load the dataset from disk into memory.

This may include pre-processing operations as specified by the context, e.g. filter certain variables, remove data points with too many NaNs, reshape data.

`ModisMultiplePoints`

Bases: Dataset

MODIS land products subsets for multiple points.

Attributes:

Name	Type	Description
`years`		timerange. For example years=[2000, 2002] downloads data for three years.
`resample`		Resample the dataset to a different time resolution. If None, no resampling.
`points`	`Union[Sequence[Tuple[float, float]], PointsFromOther]`	provided as a list of points like so: `[[longitude, latitude], ...]` in WGS84projection.
`product`	`str`	A MODIS product. Use `modis_products()` to get list of available products.
`bands`	`conset(str, min_items=1)`	MODIS product bands. Use `modis_bands(product)` to get list of available bands for a product.

`download()`

Download the data.

Only downloads if data is not in CONFIG.cache_dir or CONFIG.force_override is TRUE.

`load()`

Load the dataset from disk into memory.

This may include pre-processing operations as specified by the context, e.g. filter certain variables, remove data points with too many NaNs, reshape data.

`modis_products()`

List all available products.

`modis_bands(product)`

List all available bands for a given product.

`modis_dates(product, lon, lat)`

List all available dates (temporal coverage) for a given product and location.