Mercurial > gemma
view pkg/models/reproject.go @ 1644:eadf84bb0e98
New config variable 'external-url'.
Deep inside the import queue we don't known the URL we find the server at.
We don't have any HTTP request we can derive this information wrong
so it needs to be configured.
Defaults to http://${web-host}:${web-port} .
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Thu, 20 Dec 2018 14:39:23 +0100 |
parents | d753ce6cf588 |
children | 1222b777f51f |
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// This is Free Software under GNU Affero General Public License v >= 3.0 // without warranty, see README.md and license for details. // // SPDX-License-Identifier: AGPL-3.0-or-later // License-Filename: LICENSES/AGPL-3.0.txt // // Copyright (C) 2018 by via donau // – Österreichische Wasserstraßen-Gesellschaft mbH // Software engineering by Intevation GmbH // // Author(s): // * Sascha L. Teichmann <sascha.teichmann@intevation.de> package models import ( "context" "database/sql" ) const reprojectSQL = ` SELECT ST_X(p), ST_Y(p) FROM ST_Transform(ST_SetSRID(ST_MakePoint($1, $2), $3::integer), $4::integer) AS p` type Reprojector struct { stmt *sql.Stmt FromEPSG uint32 ToEPSG uint32 } func NewReprojector( ctx context.Context, conn *sql.Conn, fromEPSG, toEPSG uint32, ) (*Reprojector, error) { stmt, err := conn.PrepareContext(ctx, reprojectSQL) if err != nil { return nil, err } return &Reprojector{ stmt: stmt, FromEPSG: fromEPSG, ToEPSG: toEPSG, }, nil } func (r *Reprojector) Close() error { if s := r.stmt; s != nil { r.stmt = nil return s.Close() } return nil } func (r *Reprojector) Reproject( ctx context.Context, x, y float64, ) (v, w float64, err error) { err = r.stmt.QueryRowContext(ctx, x, y, r.FromEPSG, r.ToEPSG).Scan(&v, &w) return }