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# ~*~ coding: utf-8 ~*~ |
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#- |
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# OSMAlchemy - OpenStreetMap to SQLAlchemy bridge |
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# Copyright (c) 2016 Dominik George <[email protected]> |
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# |
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# Permission is hereby granted, free of charge, to any person obtaining a copy |
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# of this software and associated documentation files (the "Software"), to deal |
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# in the Software without restriction, including without limitation the rights |
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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# copies of the Software, and to permit persons to whom the Software is |
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# furnished to do so, subject to the following conditions: |
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# |
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# The above copyright notice and this permission notice shall be included in all |
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# copies or substantial portions of the Software. |
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# |
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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# SOFTWARE. |
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# |
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# Alternatively, you are free to use OSMAlchemy under Simplified BSD, The |
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# MirOS Licence, GPL-2+, LGPL-2.1+, AGPL-3+ or the same terms as Python |
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# itself. |
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""" Utility code for OSMAlchemy's online functionality. """ |
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import overpass |
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def _generate_overpass_api(endpoint=None): |
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""" Create and initialise the Overpass API object. |
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Passing the endpoint argument will override the default |
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endpoint URL. |
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""" |
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# Create API object with default settings |
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api = overpass.API() |
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# Change endpoint if desired |
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if endpoint is not None: |
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api.endpoint = endpoint |
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return api |
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def _get_single_element_by_id(api, type, id, recurse_down=True): |
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""" Retrieves a single OpenStreetMap element by its id. |
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api - an initialised Overpass API object |
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type - the element type to query, one of node, way or relation |
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id - the id of the element to retrieve |
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recurse_down - whether to get child nodes of ways and relations |
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""" |
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# Construct query |
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q = "%s(%d);%s" % (type, id, "(._;>;);" if recurse_down else "") |
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# Run query |
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r = api.Get(q, responseformat="xml") |
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# Return data |
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return r |
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Natureshadow /
OSMAlchemy
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