Mercurial > gemma

annotate schema/geo_functions.sql @ 2624:9dbaf69c7a66

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Improve geoserver config to better calculate bounding boxes * Disable the use of estimated extents for the postgis storage configuration for geoserver, which is set via the gemma middleware. This way we are able to get better bounding boxes for many layers where the postgis function `ST_EstimatedExtent()` would be far off.
author Bernhard Reiter <bernhard@intevation.de>
date Wed, 13 Mar 2019 16:18:39 +0100
parents 661597546ed9
children 1b6840093eac
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 -- This is Free Software under GNU Affero General Public License v >= 3.0
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2 -- without warranty, see README.md and license for details.
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3
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4 -- SPDX-License-Identifier: AGPL-3.0-or-later
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5 -- License-Filename: LICENSES/AGPL-3.0.txt
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6
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7 -- Copyright (C) 2018 by via donau
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8 -- – Österreichische Wasserstraßen-Gesellschaft mbH
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9 -- Software engineering by Intevation GmbH
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10
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11 -- Author(s):
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12 -- * Sascha L. Teichmann <sascha.teichmann@intevation.de>
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13
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14 CREATE OR REPLACE FUNCTION best_utm(g geometry) RETURNS integer AS
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15 $$
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16 DECLARE
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17 center geometry;
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18 BEGIN
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19 SELECT ST_Centroid(g) INTO center;
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20 RETURN
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21 CASE WHEN ST_Y(center) > 0 THEN
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22 32600
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23 ELSE
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24 32700
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25 END + floor((ST_X(center)+180)/6)::int + 1;
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26 END;
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27 $$
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28 LANGUAGE plpgsql
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29 IMMUTABLE;
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30
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31 CREATE OR REPLACE FUNCTION utm_covers(g geography) RETURNS boolean AS
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32 $$
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33 DECLARE
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34 user_area geometry;
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35 utm integer;
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36 BEGIN
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37 SELECT area::geometry FROM users.responsibility_areas INTO user_area
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38 WHERE country = users.current_user_country();
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39 SELECT best_utm(user_area) INTO utm;
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40 RETURN ST_Covers(
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41 ST_Transform(user_area, utm),
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42 ST_Transform(g::geometry, utm));
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43 END;
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44 $$
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45 LANGUAGE plpgsql
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46 STABLE;