diff --git a/src/coords/mapper.rs b/src/coords/mapper.rs
index 9e46d76..b846b90 100644
--- a/src/coords/mapper.rs
+++ b/src/coords/mapper.rs
@@ -3,15 +3,11 @@ use crate::render::WindowCoord;
 use super::{proj::ProjectionS, Range};
 use geo_types::{coord, Coord as GCoord, LineString};
 use proj::{Proj, ProjError};
-use std::ops;
 
 pub struct Mapper {
     proj: Proj,
     pub range: (Range, Range),
     bounds: (f64, f64, f64, f64),
-    scale: f32,
-    translate: (f32, f32),
-    focus_point: Option<(f64, f64)>,
 }
 impl From<Proj> for Mapper {
     fn from(proj: Proj) -> Self {
@@ -21,9 +17,6 @@ impl From<Proj> for Mapper {
             proj: proj,
             range: (default_range.0.into(), default_range.1.into()),
             bounds,
-            scale: 1.0,
-            translate: (0.0, 0.0),
-            focus_point: None,
         }
     }
 }
@@ -50,42 +43,17 @@ impl Mapper {
             proj: proj,
             range,
             bounds,
-            scale,
-            translate,
-            focus_point: None,
         }
     }
 
     pub fn fore_map(&self, coord: WindowCoord) -> Result<(f64, f64), ProjError> {
-        let (t1, t2) = if let Some(_) = self.focus_point {
-            let (a, b) = self.translate;
-            (a * (self.scale - 1.0), b * (self.scale - 1.0))
-        } else {
-            self.translate
-        };
         let (x, y) = coord;
-        let c = (x as f64 + t1 as f64) / self.scale as f64 * (self.bounds.1 - self.bounds.0)
-            + self.bounds.0;
-        let d = (y as f64 + t2 as f64) / self.scale as f64 * (self.bounds.3 - self.bounds.2)
-            + self.bounds.2;
+        let c = (x as f64) * (self.bounds.1 - self.bounds.0) + self.bounds.0;
+        let d = (y as f64) * (self.bounds.3 - self.bounds.2) + self.bounds.2;
         let (lon, lat) = self.proj.project((c, d), true)?;
         Ok((lon.to_degrees(), lat.to_degrees()))
     }
 
-    pub fn set_scale(&mut self, scale: f32) {
-        self.scale = scale;
-    }
-
-    pub fn set_translate(&mut self, translate: (f32, f32)) {
-        self.translate = translate;
-    }
-
-    pub fn set_focus_point(&mut self, point: (f64, f64)) {
-        self.focus_point = Some(point);
-        let (rx, ry) = self.map(point).unwrap();
-        self.translate = (rx as f32, ry as f32);
-    }
-
     pub fn point_in_bound(&self, point: (f64, f64)) -> bool {
         let (x, y) = point;
         let (lon_range, lat_range) = self.range;
@@ -104,17 +72,8 @@ impl Mapper {
             .proj
             .convert((point.0.to_radians(), point.1.to_radians()))?;
 
-        let (t1, t2) = if let Some(_) = self.focus_point {
-            let (a, b) = self.translate;
-            (a * (self.scale - 1.0), b * (self.scale - 1.0))
-        } else {
-            self.translate
-        };
-
-        let x = (p1 - self.bounds.0) / (self.bounds.1 - self.bounds.0) * self.scale as f64
-            - t1 as f64 * self.scale as f64;
-        let y = (p2 - self.bounds.2) / (self.bounds.3 - self.bounds.2) * self.scale as f64
-            - t2 as f64 * self.scale as f64;
+        let x = (p1 - self.bounds.0) / (self.bounds.1 - self.bounds.0);
+        let y = (p2 - self.bounds.2) / (self.bounds.3 - self.bounds.2);
 
         Ok((x, y))
     }
diff --git a/src/monitor/mod.rs b/src/monitor/mod.rs
index a8843e5..8223504 100644
--- a/src/monitor/mod.rs
+++ b/src/monitor/mod.rs
@@ -30,13 +30,22 @@ impl Monitor {
         scale_detecture.connect_scroll(clone!(
                 @weak this as s, @weak render as r  => @default-panic,move |_context, _x, y| {
                     let renderer = s.imp().renderer.borrow();
+                    let p = r.imp().config.borrow().pointer_lon_lat;
+                    let (px,py) = r.imp().mapper.borrow().map(p).unwrap();
+
+                    let mut scale = 1.0;
+
                     renderer.change_cfg(|cfg| {
                         let current_scale = cfg.scale;
-                        let scale =  (current_scale - y as f32 / 10.0).max(1.0).min(5.0);
-                        cfg.scale = scale;
-                        r.imp().mapper.borrow_mut().set_scale(scale);
+                        let s =  (current_scale - y as f32 / 10.0).max(1.0).min(5.0);
+                        cfg.scale = s;
+                        scale = s;
                     });
-                    r.calc_translate();
+                    r.set_translate((
+                        px as f32 * (scale - 1.0),
+                        py as f32 * (scale - 1.0)
+                    ));
+                    r.queue_render();
                     Inhibit(false)
                 }
         ));
@@ -48,6 +57,7 @@ impl Monitor {
             r.change_cfg(|cfg|{
                 cfg.updated_translate = ( - ox as f32, -oy as f32);
             } );
+            r.queue_render();
         }));
         drag_detecture.connect_drag_end(clone!(
             @weak render as r => move |this,_,_|{
diff --git a/src/render/background/mod.rs b/src/render/background/mod.rs
index 7c8e1e8..4eb22cd 100644
--- a/src/render/background/mod.rs
+++ b/src/render/background/mod.rs
@@ -79,8 +79,8 @@ impl BackgroundWidget {
                         .points()
                         .map(|p| {
                             (
-                                p.x() as f32 * canvas_width - translate.0,
-                                (1.0 - p.y() as f32) * canvas_height - translate.1,
+                                p.x() as f32 * canvas_width * scale - translate.0,
+                                (1.0 - p.y() as f32) * canvas_height * scale - translate.1,
                             )
                                 .into()
                         })
@@ -135,8 +135,8 @@ impl BackgroundWidget {
                         .points()
                         .map(|p| {
                             (
-                                p.x() as f32 * canvas_width - translate.0,
-                                (1.0 - p.y()) as f32 * canvas_height - translate.1,
+                                p.x() as f32 * canvas_width * scale - translate.0,
+                                (1.0 - p.y()) as f32 * canvas_height * scale - translate.1,
                             )
                                 .into()
                         })
@@ -236,8 +236,8 @@ impl BackgroundWidget {
     ) -> (f32, f32) {
         let (x, y) = mapper.map(point).unwrap();
         (
-            x as f32 * canvas_width - translate.0,
-            (1.0 - y as f32) * canvas_height - translate.1,
+            x as f32 * canvas_width * scale - translate.0,
+            (1.0 - y as f32) * canvas_height * scale - translate.1,
         )
     }
 
diff --git a/src/render/imp.rs b/src/render/imp.rs
index 702b3e3..f5d9e9c 100644
--- a/src/render/imp.rs
+++ b/src/render/imp.rs
@@ -63,10 +63,10 @@ impl ObjectImpl for Render {
         let area = self.obj();
         area.set_has_stencil_buffer(true);
 
-        area.add_tick_callback(|area, _| {
-            area.queue_render();
-            glib::Continue(true)
-        });
+        // area.add_tick_callback(|area, _| {
+        //     area.queue_render();
+        //     glib::Continue(true)
+        // });
     }
 }
 
diff --git a/src/render/mod.rs b/src/render/mod.rs
index 78d97a3..aadc23a 100644
--- a/src/render/mod.rs
+++ b/src/render/mod.rs
@@ -69,33 +69,26 @@ impl Render {
             let cw = canvas.width();
             let ch = canvas.height();
             let (tx, ty) = self.imp().translate();
-            println!("tx,ty: {:?}", (tx, ty));
-            println!("x :{} , y: {}, x + tx :{}", x, y, x + tx);
+            let scale = self.imp().config.borrow().scale;
             let (lon, lat) = self
                 .imp()
                 .mapper
                 .borrow()
                 .fore_map((
-                    (x * dpi as f32+ tx) / cw,
-                    (1.0 - (y * dpi as f32+ ty) / ch ),
+                    (x * dpi as f32 + tx) / cw / scale,
+                    (1.0 - (y * dpi as f32 + ty) / ch / scale),
                 ))
                 .unwrap();
-            println!("lon,lat : {:?}", (lon, lat));
             let mut cfg = self.imp().config.borrow_mut();
             cfg.pointer_lon_lat = (lon, lat);
             cfg.pointer_location = (x, y);
         }
     }
 
-    pub fn calc_translate(&self) {
-        let ll = self.imp().config.borrow().pointer_lon_lat;
-        let scale = self.imp().config.borrow().scale;
-        let (rx, ry) = self.imp().mapper.borrow().map((ll.0, ll.1)).unwrap();
-
-        self.imp()
-            .mapper
-            .borrow_mut()
-            .set_translate((rx as f32 * (scale - 1.0), ry as f32 * (scale - 1.0)));
+    pub fn set_translate(&self, trans: (f32, f32)) {
+        if let Some(c) = self.imp().canvas.borrow().as_ref() {
+            self.imp().config.borrow_mut().translate = (c.width() * trans.0, c.height() * trans.1);
+        }
     }
 
     pub fn set_mapper(&self, mapper: Mapper) {