1 <% form_tag :action => "finish" do %>
3 <p class="export_heading">Area to Export</p>
5 <div class="export_bounds">
6 <%= text_field_tag('maxlat', nil, :size => 10, :class => "export_bound") %>
8 <%= text_field_tag('minlon', nil, :size => 10, :class => "export_bound") %>
9 <%= text_field_tag('maxlon', nil, :size => 10, :class => "export_bound") %>
11 <%= text_field_tag('minlat', nil, :size => 10, :class => "export_bound") %>
12 <p class="export_hint">
13 Drag a box with control held down to select an area to export
17 <p class="export_heading">Format to Export</p>
19 <div class="export_details">
21 <%= radio_button_tag("format", "osm") %>OpenStreetMap XML Data
23 <%= radio_button_tag("format", "mapnik") %>Mapnik Image
25 <%= radio_button_tag("format", "osmarender") %>Osmarender Image
30 <p class="export_heading">Licence</p>
32 <div class="export_details">
33 <p>OSM license agreement blah blah blah...</p>
37 <div id="export_mapnik">
38 <p class="export_heading">Options</p>
40 <div class="export_details">
41 <p>Format <%= select_tag("mapnik_format", options_for_select([["PNG", "png"], ["JPEG", "jpeg"], ["SVG", "svg"], ["PDF", "pdf"], ["Postscript", "ps"]], "png")) %></p>
42 <p>Scale 1 : <%= text_field_tag("mapnik_scale", nil, :size => 8) %> <span class="export_hint">(max 1 : <span id="max_scale"></span>)</span></p>
46 <div id="export_osmarender">
47 <p class="export_heading">Options</p>
49 <div class="export_details">
50 <p>Format <%= select_tag("osmarender_format", options_for_select([["PNG", "png"], ["JPEG", "jpeg"]], "png")) %></p>
51 <p>Zoom <%= select_tag("osmarender_zoom", options_for_select([4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17])) %></p>
55 <div class="export_buttons">
56 <p><%= submit_tag "Export", :id => "export_commit" %></p>
61 <script type="text/javascript">
65 function startExport() {
66 var vectors = new OpenLayers.Layer.Vector("Vector Layer", {
67 displayInLayerSwitcher: false,
69 map.addLayer(vectors);
71 box = new OpenLayers.Control.DrawFeature(vectors, OpenLayers.Handler.RegularPolygon, {
73 keyMask: OpenLayers.Handler.MOD_CTRL,
78 callbacks: { done: boxComplete }
85 map.events.register("moveend", map, mapMoved);
86 updateRegion(map.getExtent());
89 function formatChanged() {
90 if ($("format_osm").checked) {
91 $("export_osm").style.display = "inline";
93 $("export_osm").style.display = "none";
96 if ($("format_mapnik").checked) {
97 $("mapnik_scale").value = roundScale(map.getScale());
98 $("export_mapnik").style.display = "inline";
100 $("export_mapnik").style.display = "none";
103 if ($("format_osmarender").checked) {
104 var zoom = Math.min(map.getZoom(), maxOsmarenderZoom());
106 $("osmarender_zoom").options.selectedIndex = zoom - 4;
107 $("export_osmarender").style.display = "inline";
109 $("export_osmarender").style.display = "none";
113 $("format_osm").onclick = function() { formatChanged() };
114 $("format_mapnik").onclick = function() { formatChanged() };
115 $("format_osmarender").onclick = function() { formatChanged() };
117 function boundsChanged() {
118 var epsg4326 = new OpenLayers.Projection("EPSG:4326");
119 var bounds = new OpenLayers.Bounds($("minlon").value,
124 bounds.transform(epsg4326, map.getProjectionObject());
126 map.events.unregister("moveend", map, mapMoved);
127 map.zoomToExtent(bounds);
130 box.handler.feature = new OpenLayers.Feature.Vector(bounds.toGeometry());
131 box.handler.layer.addFeatures([box.handler.feature], [box.handler.style]);
132 box.handler.layer.drawFeature(box.handler.feature, box.handler.style);
135 $("maxlat").onchange = function() { boundsChanged() };
136 $("minlon").onchange = function() { boundsChanged() };
137 $("maxlon").onchange = function() { boundsChanged() };
138 $("minlat").onchange = function() { boundsChanged() };
140 function mapMoved() {
141 updateRegion(map.getExtent());
144 function boxComplete(box) {
145 map.events.unregister("moveend", map, mapMoved);
146 updateRegion(box.getBounds());
149 function updateRegion(bounds) {
150 var epsg4326 = new OpenLayers.Projection("EPSG:4326");
151 var decimals = Math.pow(10, Math.floor(map.getZoom() / 3));
153 bounds.transform(map.getProjectionObject(), epsg4326);
155 $("minlon").value = Math.round(bounds.left * decimals) / decimals;
156 $("minlat").value = Math.round(bounds.bottom * decimals) / decimals;
157 $("maxlon").value = Math.round(bounds.right * decimals) / decimals;
158 $("maxlat").value = Math.round(bounds.top * decimals) / decimals;
160 if (bounds.getWidth() * bounds.getHeight() > 0.25) {
161 $("format_osm").disabled = true;
162 $("format_osm").checked = false;
166 $("format_osm").disabled = false;
169 var max_zoom = maxOsmarenderZoom();
170 var max_scale = maxMapnikScale();
172 $("max_scale").innerHTML = roundScale(max_scale);
174 for (var o = 0; o < $("osmarender_zoom").options.length; o++) {
175 var option = $("osmarender_zoom").options[o];
177 if (option.value > max_zoom) {
178 option.disabled = true;
180 option.disabled = false;
184 if ($("osmarender_zoom").options.selectedIndex + 4 > max_zoom) {
185 $("osmarender_zoom").options.selectedIndex = max_zoom - 4;
189 function maxMapnikScale() {
190 var bounds = new OpenLayers.Bounds($("minlon").value, $("minlat").value, $("maxlon").value, $("maxlat").value);
191 var epsg4326 = new OpenLayers.Projection("EPSG:4326");
192 var epsg900913 = new OpenLayers.Projection("EPSG:900913");
194 bounds.transform(epsg4326, epsg900913);
196 return Math.floor(Math.sqrt(bounds.getWidth() * bounds.getHeight() / 0.3136));
199 function maxOsmarenderZoom() {
200 var bounds = new OpenLayers.Bounds($("minlon").value, $("minlat").value, $("maxlon").value, $("maxlat").value);
201 var xzoom = Math.LOG2E * Math.log(2000 * 1.40625 / bounds.getWidth());
202 var ymin = bounds.bottom * Math.PI / 180;
203 var ymax = bounds.top * Math.PI / 180;
204 var yzoom = Math.LOG2E * (Math.log(2000 * 2 * Math.PI) - Math.log(Math.log((Math.tan(ymax) + 1 / Math.cos(ymax)) / (Math.tan(ymin) + 1 / Math.cos(ymin)))))
206 return Math.floor(Math.min(xzoom, yzoom));
209 function roundScale(scale) {
210 var precision = 5 * Math.pow(10, Math.floor(Math.LOG10E * Math.log(scale)) - 2);
212 return precision * Math.ceil(scale / precision);
215 function validateScale() {
216 if ($("mapnik_scale").value < maxMapnikScale()) {
217 $("export_commit").disabled = true;
219 $("export_commit").disabled = false;
223 $("mapnik_scale").onchange = function() { validateScale() };