Mercurial > gemma
view pkg/models/reproject.go @ 989:da19c68e36ba
Typo fix.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Sat, 20 Oct 2018 19:27:33 +0200 |
parents | 01ba06da8f46 |
children | a244b18cb916 |
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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( conn *sql.Conn, ctx context.Context, 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( x, y float64, ctx context.Context, ) (v, w float64, err error) { err = r.stmt.QueryRowContext(ctx, x, y, r.FromEPSG, r.ToEPSG).Scan(&v, &w) return }