diff --git a/app/src/frontend/app.js b/app/src/frontend/app.js
index 884cd2fa..32a4c51c 100644
--- a/app/src/frontend/app.js
+++ b/app/src/frontend/app.js
@@ -10,12 +10,11 @@ import BuildingEdit from './building-edit';
 import BuildingView from './building-view';
 import ColouringMap from './map';
 import Header from './header';
-import Legend from './legend';
+import Overview from './overview';
 import Login from './login';
 import MyAccountPage from './my-account';
 import SignUp from './signup';
 import Welcome from './welcome';
-import BuildingEditAny from './building-edit-any';
 
 
 
@@ -83,18 +82,26 @@ class App extends React.Component {
                                 <Route exact path="/">
                                     <Welcome />
                                 </Route>
-                                <Route exact path="/select.html">
-                                    <BuildingEditAny user={this.state.user} />
-                                </Route>
-                                <Route exact path="/map/:map.html" component={Legend} />
-                                <Route exact path="/building/:building.html" render={(props) => (
+                                <Route exact path="/view/:cat.html" render={(props) => (
+                                    <Overview
+                                        {...props}
+                                        mode='view' user={this.state.user}
+                                        />
+                                ) } />
+                                <Route exact path="/edit/:cat.html" render={(props) => (
+                                    <Overview
+                                        {...props}
+                                        mode='edit' user={this.state.user}
+                                        />
+                                ) } />
+                                <Route exact path="/view/:cat/building/:building.html" render={(props) => (
                                     <BuildingView
                                         {...props}
                                         {...this.state.building}
                                         user={this.state.user}
                                         />
                                 ) } />
-                                <Route exact path="/building/:building/edit.html" render={(props) => (
+                                <Route exact path="/edit/:cat/building/:building.html" render={(props) => (
                                     <BuildingEdit
                                         {...props}
                                         {...this.state.building}
@@ -106,7 +113,7 @@ class App extends React.Component {
                         </CSSTransition>
                     </TransitionGroup>
                     <Switch>
-                        <Route exact path="/(select.html|map.*|building.*)?" render={(props) => (
+                        <Route exact path="/(edit.*|view.*)?" render={(props) => (
                             <ColouringMap
                                 {...props}
                                 building={this.state.building}
diff --git a/app/src/frontend/building-edit-any.js b/app/src/frontend/building-edit-any.js
deleted file mode 100644
index 83933baa..00000000
--- a/app/src/frontend/building-edit-any.js
+++ /dev/null
@@ -1,17 +0,0 @@
-
-import React from 'react';
-import Sidebar from './sidebar';
-import InfoBox from './info-box';
-import { Redirect } from 'react-router-dom';
-
-const BuildingEditAny = (props) => {
-    if (!props.user){
-        return <Redirect to="/sign-up.html" />
-    }
-    return (
-        <Sidebar title="Edit data">
-            <InfoBox msg="Select a building to edit by clicking on the map&hellip;" />
-        </Sidebar>
-    );
-}
-export default BuildingEditAny;
diff --git a/app/src/frontend/building-edit.js b/app/src/frontend/building-edit.js
index b51726b6..8ae0a62b 100644
--- a/app/src/frontend/building-edit.js
+++ b/app/src/frontend/building-edit.js
@@ -1,6 +1,5 @@
 import React, { Component, Fragment } from 'react';
 import { Link, NavLink, Redirect } from 'react-router-dom';
-import queryString from 'query-string';
 
 import ErrorBox from './error-box';
 import InfoBox from './info-box';
@@ -26,23 +25,32 @@ const BuildingEdit = (props) => {
         );
     }
 
-    const search = (props.location && props.location.search)?
-        queryString.parse(props.location.search):
-        {};
+    const cat = get_cat(props.match.url);
     return (
-        <Sidebar title={`You are editing`}
-            back={search.cat? `/building/${props.building_id}.html?cat=${search.cat}`: `/building//${props.building_id}.html`}>
+        <Sidebar
+            key={props.building_id}
+            title={`You are editing`}
+            back={`/edit/${cat}.html`}>
             {
                 CONFIG.map((conf_props) => {
                     return <EditForm
                         {...conf_props} {...props}
-                        search={search} key={conf_props.slug} />
+                        cat={cat} key={conf_props.slug} />
                 })
             }
         </Sidebar>
     );
 }
 
+function get_cat(url) {
+    if (url === "/") {
+        return "age"
+    }
+    const matches = /^\/(view|edit)\/([^\/.]+)/.exec(url);
+    const cat = (matches && matches.length > 2)? matches[2] : "age";
+    return cat;
+}
+
 class EditForm extends Component {
     constructor(props) {
         super(props);
@@ -116,7 +124,7 @@ class EditForm extends Component {
                 this.setState({error: res.error})
             } else {
                 this.props.selectBuilding(res);
-                const new_cat = this.props.search.cat;
+                const new_cat = this.props.cat;
                 this.props.history.push(`/building/${res.building_id}.html?cat=${new_cat}`);
             }
         }.bind(this)).catch(
@@ -125,14 +133,17 @@ class EditForm extends Component {
     }
 
     render() {
-        const match = this.props.search.cat === this.props.slug;
-        if (!match) {
-            return null
-        }
+        const match = this.props.cat === this.props.slug;
         return (
             <section className={(this.props.inactive)? "data-section inactive": "data-section"}>
                 <header className={(match? "active " : "") + " section-header edit"}>
-                    <a><h3 className="h3">{this.props.title}</h3></a>
+                    <NavLink
+                        to={`/edit/${this.props.slug}/building/${this.props.building_id}.html`}
+                        title={(this.props.inactive)? 'Coming soon… Click the ? for more info.' :
+                            (match)? 'Hide details' : 'Show details'}
+                        isActive={() => match}>
+                        <h3 className="h3">{this.props.title}</h3>
+                    </NavLink>
                     <nav className="icon-buttons">
                     {
                         this.props.help?
@@ -142,31 +153,34 @@ class EditForm extends Component {
                         : null
                     }
                     {
-                        (this.props.slug === 'like')? // special-case for likes
+                        (match && this.props.slug === 'like')? // special-case for likes
                         <NavLink className="icon-button save" title="Done"
-                        to={`/building/${this.props.building_id}.html?cat=${this.props.slug}`}>
+                        to={`/edit/${this.props.slug}/building/${this.props.building_id}.html`}>
                             Done
                             <SaveIcon />
                         </NavLink>
                         :
+                        match? (
                         <Fragment>
                         <NavLink className="icon-button save" title="Save Changes"
                         onClick={this.handleSubmit}
-                            to={`/building/${this.props.building_id}.html?cat=${this.props.slug}`}>
+                            to={`/edit/${this.props.slug}/building/${this.props.building_id}.html`}>
                             Save
                             <SaveIcon />
                         </NavLink>
                         <NavLink className="icon-button close-edit" title="Cancel"
-                        to={`/building/${this.props.building_id}.html?cat=${this.props.slug}`}>
+                        to={`/view/${this.props.slug}/building/${this.props.building_id}.html`}>
                             Cancel
                             <CloseIcon />
                         </NavLink>
                         </Fragment>
+                        ): null
                     }
                     </nav>
                 </header>
-
-                <form action={`/building/${this.props.building_id}.html?cat=${this.props.slug}`}
+                {
+                match? (
+                <form action={`/edit/${this.props.slug}/building/${this.props.building_id}.html`}
                     method="GET" onSubmit={this.handleSubmit}>
                     <ErrorBox msg={this.state.error} />
                     {
@@ -216,6 +230,8 @@ class EditForm extends Component {
                        </div>
                     }
                 </form>
+                ) : null
+            }
             </section>
         )
     }
diff --git a/app/src/frontend/building-view.js b/app/src/frontend/building-view.js
index 5a8a0bb5..d3b3c8a3 100644
--- a/app/src/frontend/building-view.js
+++ b/app/src/frontend/building-view.js
@@ -1,6 +1,5 @@
 import React, { Fragment } from 'react';
 import { Link, NavLink } from 'react-router-dom';
-import queryString from 'query-string';
 
 import Sidebar from './sidebar';
 import Tooltip from './tooltip';
@@ -16,18 +15,18 @@ const BuildingView = (props) => {
             <Sidebar title="Building Not Found">
                 <InfoBox msg="We can't find that one anywhere - try the map again?" />
                 <div className="buttons-container with-space">
-                    <Link to="/map/age.html" className="btn btn-secondary">Back to maps</Link>
+                    <Link to="/view/age.html" className="btn btn-secondary">Back to maps</Link>
                 </div>
             </Sidebar>
         );
     }
-    const search = (props.location && props.location.search)? queryString.parse(props.location.search): {};
+    const cat = get_cat(props.match.url);
     return (
-        <Sidebar title={`Data available for this building`} back={search.cat? `/map/${search.cat}.html` : "/map/age.html"}>
+        <Sidebar title={`Data available for this building`} back={`/view/${cat}.html`}>
             {
                 CONFIG.map(section_props => (
                     <DataSection
-                        key={section_props.slug} search={search}
+                        key={section_props.slug} cat={cat}
                         building_id={props.building_id}
                         {...section_props}>
                         {
@@ -54,13 +53,23 @@ const BuildingView = (props) => {
 }
 
 
+function get_cat(url) {
+    if (url === "/") {
+        return "age"
+    }
+    const matches = /^\/(view|edit)\/([^\/.]+)/.exec(url);
+    const cat = (matches && matches.length > 2)? matches[2] : "age";
+    return cat;
+}
+
+
 const DataSection = (props) => {
-    const match = props.search.cat === props.slug;
+    const match = props.cat === props.slug;
     return (
         <section id={props.slug} className={(props.inactive)? "data-section inactive": "data-section"}>
             <header className={(match? "active " : "") + " section-header view"}>
                 <NavLink
-                    to={`/building/${props.building_id}.html` + ((match)? '': `?cat=${props.slug}`)}
+                    to={`/view/${props.slug}/building/${props.building_id}.html`}
                     title={(props.inactive)? 'Coming soon… Click the ? for more info.' :
                         (match)? 'Hide details' : 'Show details'}
                     isActive={() => match}>
@@ -77,7 +86,7 @@ const DataSection = (props) => {
                 {
                     !props.inactive?
                     <NavLink className="icon-button edit" title="Edit data"
-                        to={`/building/${props.building_id}/edit.html?cat=${props.slug}`}>
+                        to={`/edit/${props.slug}/building/${props.building_id}.html`}>
                         Edit
                         <EditIcon />
                     </NavLink>
diff --git a/app/src/frontend/header.js b/app/src/frontend/header.js
index 664bd633..e262b012 100644
--- a/app/src/frontend/header.js
+++ b/app/src/frontend/header.js
@@ -19,10 +19,10 @@ const Header = (props) => (
                     <a className="nav-link" href="https://pages.colouring.london/about">More about</a>
                 </li>
                 <li className="nav-item">
-                    <NavLink to="/map/age.html" className="nav-link">View Maps</NavLink>
+                    <NavLink to="/view/age.html" className="nav-link">View Maps</NavLink>
                 </li>
                 <li className="nav-item">
-                    <NavLink to="/select.html" className="nav-link">Add/Edit Data</NavLink>
+                    <NavLink to="/edit/age.html" className="nav-link">Add/Edit Data</NavLink>
                 </li>
                 <li className="nav-item">
                     <a className="nav-link" href="https://pages.colouring.london/buildingcategories">Building Categories</a>
diff --git a/app/src/frontend/legend.js b/app/src/frontend/legend.js
index 7991f4d8..d622faab 100644
--- a/app/src/frontend/legend.js
+++ b/app/src/frontend/legend.js
@@ -1,163 +1,73 @@
-import React, { Fragment } from 'react';
-import { NavLink } from 'react-router-dom';
+import React from 'react';
 
-import Sidebar from './sidebar';
-import { EditIcon } from './icons';
 import './legend.css';
 
-import CONFIG from './fields-config.json';
-import InfoBox from './info-box';
-
 
 const LEGEND_CONFIG = {
     location: [
-        {
-            title: 'Location Information (number of data entries)',
-            slug: 'location',
-            elements: [
-                { color: '#f0f9e8', text: '>5' },
-                { color: '#bae4bc', text: '4' },
-                { color: '#7bccc4', text: '3' },
-                { color: '#43a2ca', text: '2' },
-                { color: '#0868ac', text: '1' }
-            ]
-        }
+        { color: '#f0f9e8', text: '>5' },
+        { color: '#bae4bc', text: '4' },
+        { color: '#7bccc4', text: '3' },
+        { color: '#43a2ca', text: '2' },
+        { color: '#0868ac', text: '1' }
     ],
     age: [
-        {
-            title: 'Year Built',
-            slug: 'date_year',
-            elements: [
-                { color: '#f0eaba', text: '≥2000' },
-                { color: '#fae269', text: '1980–2000' },
-                { color: '#fbaf27', text: '1960–1980' },
-                { color: '#e6711d', text: '1940–1960' },
-                { color: '#d73d3a', text: '1920–1940' },
-                { color: '#ba221c', text: '1900–1920' },
-                { color: '#bb859b', text: '1880–1900' },
-                { color: '#8b3654', text: '1860–1880' },
-                { color: '#8f5385', text: '1840–1860' },
-                { color: '#56619b', text: '1820–1840' },
-                { color: '#6793b2', text: '1800–1820' },
-                { color: '#83c3b3', text: '1780–1800' },
-                { color: '#adc88f', text: '1760–1780' },
-                { color: '#83a663', text: '1740–1760' },
-                { color: '#77852d', text: '1720–1740' },
-                { color: '#69814e', text: '1700–1720' },
-                { color: '#d0c291', text: '1680–1700' },
-                { color: '#918158', text: '1660–1680' },
-                { color: '#7a5732', text: '<1660' },
-            ]
-        }
+        { color: '#f0eaba', text: '≥2000' },
+        { color: '#fae269', text: '1980–2000' },
+        { color: '#fbaf27', text: '1960–1980' },
+        { color: '#e6711d', text: '1940–1960' },
+        { color: '#d73d3a', text: '1920–1940' },
+        { color: '#ba221c', text: '1900–1920' },
+        { color: '#bb859b', text: '1880–1900' },
+        { color: '#8b3654', text: '1860–1880' },
+        { color: '#8f5385', text: '1840–1860' },
+        { color: '#56619b', text: '1820–1840' },
+        { color: '#6793b2', text: '1800–1820' },
+        { color: '#83c3b3', text: '1780–1800' },
+        { color: '#adc88f', text: '1760–1780' },
+        { color: '#83a663', text: '1740–1760' },
+        { color: '#77852d', text: '1720–1740' },
+        { color: '#69814e', text: '1700–1720' },
+        { color: '#d0c291', text: '1680–1700' },
+        { color: '#918158', text: '1660–1680' },
+        { color: '#7a5732', text: '<1660' },
     ],
     size: [
-        {
-            title: 'Number of storeys',
-            slug: 'size_storeys',
-            elements: [
-                { color: '#ffffcc', text: '≥20' },
-                { color: '#ffeda0', text: '15-20' },
-                { color: '#fed976', text: '10–15' },
-                { color: '#feb24c', text: '6–10' },
-                { color: '#fd8d3c', text: '5' },
-                { color: '#fc4e2a', text: '4' },
-                { color: '#e31a1c', text: '3' },
-                { color: '#bd0026', text: '2' },
-                { color: '#800026', text: '1' },
-            ]
-        }
+        { color: '#ffffcc', text: '≥20' },
+        { color: '#ffeda0', text: '15-20' },
+        { color: '#fed976', text: '10–15' },
+        { color: '#feb24c', text: '6–10' },
+        { color: '#fd8d3c', text: '5' },
+        { color: '#fc4e2a', text: '4' },
+        { color: '#e31a1c', text: '3' },
+        { color: '#bd0026', text: '2' },
+        { color: '#800026', text: '1' },
     ],
     like: [
-        {
-            title: 'Which buildings do you like?',
-            slug: 'like',
-            elements: [
-                { color: '#f65400', text: 'We like these buildings 👍 🎉 +1' },
-            ]
-        }
+        { color: '#f65400', text: 'We like these buildings 👍 🎉 +1' },
     ]
 };
 
-
 const Legend = (props) => {
-    var data_layer = undefined;
-    if (props.match && props.match.params && props.match.params.map) {
-        data_layer = props.match.params.map;
-    }
-
+    let elements = LEGEND_CONFIG[props.slug];
     return (
-        <Sidebar title="View Maps">
-            <InfoBox msg="Click on the map to see more information about a building&hellip;" />
-            {
-                CONFIG.map((data_group) => (
-                    <LegendGroup {...data_group} maps={LEGEND_CONFIG[data_group.slug]}
-                        data_layer={data_layer} key={data_group.slug} />
-                ))
-            }
-        </Sidebar>
+        <dl className="data-list">
+            <dt>
+                { props.title }
+            </dt>
+            <dd>
+                <ul className="data-legend">
+                {
+                    elements.map((data_item) => (
+                        <LegendItem {...data_item} key={data_item.color} />
+                    ))
+                }
+                </ul>
+            </dd>
+        </dl>
     );
 }
 
-const LegendGroup = (props) => {
-    const match = props.data_layer === props.slug;
-    const inactive = props.inactive || !props.maps;
-    return (
-        <section className={(inactive? "inactive ": "") + "data-section legend"}>
-            <header className={(match? "active " : "") + " section-header view"}>
-                <NavLink
-                    to={match? "/map/base.html": `/map/${props.slug}.html`}
-                    isActive={() => match}
-                    title={(inactive)? 'Coming soon… Click the ? for more info.' :
-                        (match)? '' : 'Show on map'}>
-                    <h3 className="h3">{props.title}</h3>
-                </NavLink>
-                <nav className="icon-buttons">
-                    {
-                        props.help?
-                        <a className="icon-button help" href={props.help}>
-                            More info
-                        </a>
-                        : null
-                    }
-                    <NavLink className="icon-button edit" title="Edit data"
-                        to={`/select.html?cat=${props.slug}`}>
-                        Edit
-                        <EditIcon />
-                    </NavLink>
-                </nav>
-            </header>
-            <dl className="data-list">
-            {
-                (match && props.maps)?
-                props.maps.map((data_section) => (
-                    <LegendSection {...data_section} key={data_section.slug}>
-                    {
-                        data_section.elements.map((data_item) => (
-                            <LegendItem {...data_item} key={data_item.color} />
-                        ))
-                    }
-                    </LegendSection>
-                ))
-                : null
-            }
-            </dl>
-        </section>
-    )
-};
-
-const LegendSection = (props) => (
-    <Fragment>
-        <dt>
-            { props.title }
-        </dt>
-        <dd>
-            <ul className="data-legend">
-                { props.children }
-            </ul>
-        </dd>
-    </Fragment>
-);
-
 const LegendItem = (props) => (
     <li>
         <span className="key" style={ { background: props.color } }>-</span>
diff --git a/app/src/frontend/map.js b/app/src/frontend/map.js
index b08095c6..f5a968ba 100644
--- a/app/src/frontend/map.js
+++ b/app/src/frontend/map.js
@@ -1,6 +1,5 @@
 import React, { Component, Fragment } from 'react';
 import { Map, TileLayer, ZoomControl, AttributionControl } from 'react-leaflet-universal';
-import queryString from 'query-string';
 
 import '../../node_modules/leaflet/dist/leaflet.css'
 import './map.css'
@@ -26,14 +25,12 @@ class ColouringMap extends Component {
     }
 
     handleClick(e) {
-        if (this.props.match.url.match('edit')){
-            // don't navigate away from edit view
-            return
-        }
-        var lat = e.latlng.lat
-        var lng = e.latlng.lng
-        const is_building = /building/.test(this.props.match.url);
-        const new_cat = get_cat(is_building, this.props.location, this.props.match.url);
+        const is_edit = this.props.match.url.match('edit')
+        const mode = is_edit? 'edit': 'view';
+        const lat = e.latlng.lat
+        const lng = e.latlng.lng
+        const new_cat = get_cat(this.props.match.url);
+        const map_cat = new_cat || 'age';
         fetch(
             '/buildings/locate?lat='+lat+'&lng='+lng
         ).then(
@@ -42,12 +39,11 @@ class ColouringMap extends Component {
             if (data && data.length){
                 const building = data[0];
                 this.props.selectBuilding(building);
-                this.props.history.push(`/building/${building.building_id}.html`);
+                this.props.history.push(`/${mode}/${map_cat}/building/${building.building_id}.html`);
             } else {
                 // deselect but keep/return to expected colour theme
                 this.props.selectBuilding(undefined);
-                const map_cat = new_cat || 'age';
-                this.props.history.push(`/map/${map_cat}.html`);
+                this.props.history.push(`/${mode}/${map_cat}.html`);
             }
         }.bind(this)).catch(
             (err) => console.error(err)
@@ -72,7 +68,7 @@ class ColouringMap extends Component {
 
         // colour-data tiles
         const is_building = /building/.test(this.props.match.url);
-        const cat = get_cat(is_building, this.props.location, this.props.match.url);
+        const cat = get_cat(this.props.match.url);
         const tileset_by_cat = {
             age: 'date_year',
             size: 'size_storeys',
@@ -122,18 +118,12 @@ class ColouringMap extends Component {
     }
 };
 
-function get_cat(is_building, location, url) {
+function get_cat(url) {
     if (url === "/") {
         return "age"
     }
-    const search = (location && location.search)? queryString.parse(location.search) : {};
-    var cat, matches;
-    if (is_building) {
-        cat = search.cat;
-    } else {
-        matches = /\/map\/([^.]+).html/.exec(url);
-        cat = (matches && matches.length > 1)? matches[1] : "";
-    }
+    const matches = /^\/(view|edit)\/([^\/.]+)/.exec(url);
+    const cat = (matches && matches.length > 2)? matches[2] : "age";
     return cat;
 }
 
diff --git a/app/src/frontend/overview.js b/app/src/frontend/overview.js
new file mode 100644
index 00000000..5d56274f
--- /dev/null
+++ b/app/src/frontend/overview.js
@@ -0,0 +1,68 @@
+import React from 'react';
+import { NavLink, Redirect } from 'react-router-dom';
+
+import Sidebar from './sidebar';
+import { EditIcon } from './icons';
+import CONFIG from './fields-config.json';
+
+const Overview = (props) => {
+    var data_layer = 'age'; // always default
+    if (props.match && props.match.params && props.match.params.cat) {
+        data_layer = props.match.params.cat;
+    }
+
+    if (props.mode === 'edit' && !props.user){
+        return <Redirect to="/sign-up.html" />
+    }
+
+    let title = (props.mode === 'view')? 'View maps' : 'Add or edit data';
+
+    return (
+        <Sidebar title={title}>
+            {
+                CONFIG.map((data_group) => (
+                    <OverviewSection {...data_group}
+                        data_layer={data_layer} key={data_group.slug} mode={props.mode} />
+                ))
+            }
+        </Sidebar>
+    );
+}
+
+const OverviewSection = (props) => {
+    const match = props.data_layer === props.slug;
+    const inactive = props.inactive;
+    return (
+        <section className={(inactive? "inactive ": "") + "data-section legend"}>
+            <header className={(match? "active " : "") + " section-header view"}>
+                <NavLink
+                    to={`/${props.mode}/${props.slug}.html`}
+                    isActive={() => match}
+                    title={(inactive)? 'Coming soon… Click the ? for more info.' :
+                        (match)? '' : 'Show on map'}>
+                    <h3 className="h3">{props.title}</h3>
+                </NavLink>
+                <nav className="icon-buttons">
+                    {
+                        props.help?
+                        <a className="icon-button help" href={props.help}>
+                            More info
+                        </a>
+                        : null
+                    }
+                    {
+                        props.mode === 'view'?
+                        <NavLink className="icon-button edit" title="Edit data"
+                            to={`/edit/${props.slug}.html`}>
+                            Edit
+                            <EditIcon />
+                        </NavLink>
+                        : null
+                    }
+                </nav>
+            </header>
+        </section>
+    )
+};
+
+export default Overview;
diff --git a/app/src/parse.js b/app/src/parse.js
index b4c79479..04cc0efc 100644
--- a/app/src/parse.js
+++ b/app/src/parse.js
@@ -15,7 +15,7 @@ function strictParseInt(value) {
 
 
 function parseBuildingURL(url){
-    const re = /^\/building\/([^\/]+)(\/edit)?.html/;
+    const re = /\/building\/([^\/]+).html/;
     const matches = re.exec(url);
 
     if (matches && matches.length >= 2) {