Function S2RegionCoverer.Options.minLevel

Sets the minimum and maximum cell levels to be used. The default is to use all cell levels.


					
			int minLevel() const;

To find the cell level corresponding to a given physical distance, use the S2Cell metrics defined in s2metrics.h. For example, to find the cell level that corresponds to an average edge length of 10km, use:

int level =
    AVG_EDGE.getClosestLevel(S2Earth.kmToRadians(length_km));

Note that min_level() takes priority over max_cells(), i.e. cells below the given level will never be used even if this causes a large number of cells to be returned. (This doesn't apply to interior coverings, since interior coverings make no completeness guarantees -- the result is simply a set of cells that covers as much of the interior as possible while satisfying the given restrictions.)

Requires

max_level() >= min_level()

Default

Authors

ericv@google.com (Eric Veach), madric@gmail.com (Vijay Nayar)

License

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS-IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

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