diff --git a/nest_frontend/components/base/Button.module.css b/nest_frontend/components/base/Button.module.css
index 134d88f..e8e3f9a 100644
--- a/nest_frontend/components/base/Button.module.css
+++ b/nest_frontend/components/base/Button.module.css
@@ -13,6 +13,8 @@
 
 .Button[disabled] {
     opacity: 0.5;
+
+    cursor: not-allowed;
 }
 
 .Button:focus-visible {
diff --git a/nest_frontend/components/interactive/BoxConditionLocation.js b/nest_frontend/components/interactive/BoxConditionLocation.js
index f9b3706..10f426c 100644
--- a/nest_frontend/components/interactive/BoxConditionLocation.js
+++ b/nest_frontend/components/interactive/BoxConditionLocation.js
@@ -1,6 +1,6 @@
 import React, { useCallback, useContext } from "react"
 import { FontAwesomeIcon } from "@fortawesome/react-fontawesome"
-import { faLocationArrow, faMapPin, faPlus } from "@fortawesome/free-solid-svg-icons"
+import { faLocationArrow, faPlus } from "@fortawesome/free-solid-svg-icons"
 import ButtonIconOnly from "../base/ButtonIconOnly"
 import useRepositoryEditor from "../../hooks/useRepositoryEditor"
 import ContextLanguage from "../../contexts/ContextLanguage"
diff --git a/nest_frontend/components/interactive/BoxFilterDatetime.js b/nest_frontend/components/interactive/BoxFilterDatetime.js
index 47743da..5e02718 100644
--- a/nest_frontend/components/interactive/BoxFilterDatetime.js
+++ b/nest_frontend/components/interactive/BoxFilterDatetime.js
@@ -20,7 +20,7 @@ export default function BoxFilterDatetime({ ...props }) {
     const strings = useStrings()
     const { appendFilter } = useRepositoryViewer()
 
-    const submit = ({ timeRay }) => {
+    const submit = (timeRay) => {
         appendFilter(new FilterInsideTimeRay(timeRay))
     }
 
diff --git a/nest_frontend/components/interactive/BoxFilterHasPlace.js b/nest_frontend/components/interactive/BoxFilterHasPlace.js
index 49c4d7a..b2ddba3 100644
--- a/nest_frontend/components/interactive/BoxFilterHasPlace.js
+++ b/nest_frontend/components/interactive/BoxFilterHasPlace.js
@@ -4,7 +4,7 @@ import FormInline from "../base/FormInline"
 import useRepositoryViewer from "../../hooks/useRepositoryViewer"
 import useStrings from "../../hooks/useStrings"
 import { FontAwesomeIcon } from "@fortawesome/react-fontawesome"
-import { faLocationArrow, faPlus } from "@fortawesome/free-solid-svg-icons"
+import { faLocationArrow, faMapMarkerAlt, faPlus } from "@fortawesome/free-solid-svg-icons"
 import { FilterWithPlace } from "../../objects/Filter"
 import ButtonIconOnly from "../base/ButtonIconOnly"
 
@@ -33,7 +33,7 @@ export default function BoxFilterHasPlace({ ...props }) {
                 <span>
                     {strings.searchBy}
                     &nbsp;
-                    <FontAwesomeIcon icon={faLocationArrow}/>
+                    <FontAwesomeIcon icon={faMapMarkerAlt}/>
                     &nbsp;
                     {strings.byHasPlace}
                 </span>
diff --git a/nest_frontend/components/interactive/BoxFilterHashtag.js b/nest_frontend/components/interactive/BoxFilterHashtag.js
index b1f5145..8f3ac34 100644
--- a/nest_frontend/components/interactive/BoxFilterHashtag.js
+++ b/nest_frontend/components/interactive/BoxFilterHashtag.js
@@ -1,6 +1,6 @@
 import React from "react"
 import BoxFull from "../base/BoxFull"
-import { faClock } from "@fortawesome/free-solid-svg-icons"
+import { faClock, faHashtag } from "@fortawesome/free-solid-svg-icons"
 import useRepositoryViewer from "../../hooks/useRepositoryViewer"
 import useStrings from "../../hooks/useStrings"
 import { FilterHashtag } from "../../objects/Filter"
@@ -30,9 +30,9 @@ export default function BoxFilterHashtag({ ...props }) {
                 <span>
                     {strings.searchBy}
                     &nbsp;
-                    <FontAwesomeIcon icon={faClock}/>
+                    <FontAwesomeIcon icon={faHashtag}/>
                     &nbsp;
-                    {strings.byTimePeriod}
+                    {strings.byHashtag}
                 </span>
             }
             {...props}
diff --git a/nest_frontend/components/interactive/BoxFilterLocation.js b/nest_frontend/components/interactive/BoxFilterLocation.js
index c7d7114..7342478 100644
--- a/nest_frontend/components/interactive/BoxFilterLocation.js
+++ b/nest_frontend/components/interactive/BoxFilterLocation.js
@@ -3,7 +3,7 @@ import BoxFull from "../base/BoxFull"
 import useRepositoryViewer from "../../hooks/useRepositoryViewer"
 import useStrings from "../../hooks/useStrings"
 import { FontAwesomeIcon } from "@fortawesome/react-fontawesome"
-import { faMapPin } from "@fortawesome/free-solid-svg-icons"
+import { faLocationArrow, faMapPin } from "@fortawesome/free-solid-svg-icons"
 import FormInlineLocation from "./FormInlineLocation"
 import { FilterInsideMapArea } from "../../objects/Filter"
 
@@ -13,6 +13,7 @@ import { FilterInsideMapArea } from "../../objects/Filter"
  *
  * It connects to the `mapViewHook` of the RepositoryViewer.
  *
+ * @deprecated to be refactored
  * @param props - Additional props to pass to the box.
  * @returns {JSX.Element}
  * @constructor
@@ -23,7 +24,7 @@ export default function BoxFilterLocation({ ...props }) {
     const { appendFilter, mapViewHook } = useRepositoryViewer()
 
     const submit = () => {
-        appendFilter(new FilterInsideMapArea(false, mapViewHook.center, mapViewHook.radius))
+        appendFilter(new FilterInsideMapArea(mapViewHook.mapArea))
     }
 
     return (
@@ -32,7 +33,7 @@ export default function BoxFilterLocation({ ...props }) {
                 <span>
                     {strings.searchBy}
                     &nbsp;
-                    <FontAwesomeIcon icon={faMapPin}/>
+                    <FontAwesomeIcon icon={faLocationArrow}/>
                     &nbsp;
                     {strings.byZone}
                 </span>
diff --git a/nest_frontend/components/interactive/BoxVisualizationMap.js b/nest_frontend/components/interactive/BoxVisualizationMap.js
index 910ff21..3eea7b6 100644
--- a/nest_frontend/components/interactive/BoxVisualizationMap.js
+++ b/nest_frontend/components/interactive/BoxVisualizationMap.js
@@ -2,7 +2,7 @@ import React, { useContext, useMemo } from "react"
 import BoxMap from "../base/BoxMap"
 import ContextLanguage from "../../contexts/ContextLanguage"
 import { Marker, Popup } from "react-leaflet"
-import { Location } from "../../objects/location"
+import Coordinates from "../../objects/Coordinates"
 import ContextRepositoryViewer from "../../contexts/ContextRepositoryViewer"
 
 
@@ -20,10 +20,12 @@ export default function BoxVisualizationMap({ ...props }) {
     const markers = useMemo(
         () => {
             return tweets.filter(tweet => tweet.location).map(tweet => {
-                const location = Location.fromTweet(tweet)
+                if(!tweet.location) return null
+
+                const coords = Coordinates.fromCrawlerString(tweet.location)
 
                 return (
-                    <Marker key={tweet["snowflake"]} position={location.toArray()}>
+                    <Marker key={tweet["snowflake"]} position={coords.toLatLng()}>
                         <Popup>
                             <p>
                                 {tweet["content"]}
diff --git a/nest_frontend/components/interactive/FormInlineHashtag.js b/nest_frontend/components/interactive/FormInlineHashtag.js
index e6753b6..49cedf7 100644
--- a/nest_frontend/components/interactive/FormInlineHashtag.js
+++ b/nest_frontend/components/interactive/FormInlineHashtag.js
@@ -11,12 +11,11 @@ const INVALID_CHARACTERS = /([^a-z0-9_\u00c0-\u00d6\u00d8-\u00f6\u00f8-\u00ff\u0
 /**
  * A {@link FormInline} allowing the user to select a Twitter hashtag.
  *
- * @param submit - Function <string> called when the submit button is pressed.
  * @param props - Additional props to pass to the form.
  * @returns {JSX.Element}
  * @constructor
  */
-export default function FormInlineHashtag({ submit, ...props }) {
+export default function FormInlineHashtag({ ...props }) {
 
     const validate = value => {
         return value.replace(INVALID_CHARACTERS, "")
@@ -27,7 +26,6 @@ export default function FormInlineHashtag({ submit, ...props }) {
             textIcon={faHashtag}
             placeholder={"hashtag"}
             validate={validate}
-            submit={submit}
             {...props}
         />
     )
diff --git a/nest_frontend/components/interactive/FormInlineLocation.js b/nest_frontend/components/interactive/FormInlineLocation.js
index f55a6ca..ec07a41 100644
--- a/nest_frontend/components/interactive/FormInlineLocation.js
+++ b/nest_frontend/components/interactive/FormInlineLocation.js
@@ -47,21 +47,21 @@ export default function FormInlineLocation(
                 className={Style.Radius}
                 type={"text"}
                 icon={radIcon}
-                value={`${mapViewHook.radius} m`}
+                value={`${Math.round(mapViewHook.mapArea.radius / 1000)} km`}
                 disabled={true}
             />
             <InputWithIcon
                 className={Style.Latitude}
                 type={"text"}
                 icon={latIcon}
-                value={mapViewHook.center.lat.toFixed(3)}
+                value={mapViewHook.mapArea.center.lat.toFixed(3)}
                 disabled={true}
             />
             <InputWithIcon
                 className={Style.Longitude}
                 type={"text"}
                 icon={lngIcon}
-                value={mapViewHook.center.lng.toFixed(3)}
+                value={mapViewHook.mapArea.center.lng.toFixed(3)}
                 disabled={true}
             />
             <ButtonIconOnly
diff --git a/nest_frontend/components/interactive/FormInlineText.js b/nest_frontend/components/interactive/FormInlineText.js
index 80c625d..2fe0190 100644
--- a/nest_frontend/components/interactive/FormInlineText.js
+++ b/nest_frontend/components/interactive/FormInlineText.js
@@ -34,6 +34,7 @@ export default function FormInlineText(
 
     const _onSubmit = event => {
         event.preventDefault()
+        if(!value) return
         submit(value)
         setValue("")
     }
@@ -56,6 +57,7 @@ export default function FormInlineText(
                 icon={buttonIcon}
                 color={buttonColor}
                 onClick={_onSubmit}
+                disabled={!value}
             />
         </FormInline>
     )
diff --git a/nest_frontend/components/interactive/FormInlineTimeRay.js b/nest_frontend/components/interactive/FormInlineTimeRay.js
index 90b5815..dd7b7ac 100644
--- a/nest_frontend/components/interactive/FormInlineTimeRay.js
+++ b/nest_frontend/components/interactive/FormInlineTimeRay.js
@@ -8,7 +8,7 @@ import ButtonToggleBeforeAfter from "./ButtonToggleBeforeAfter"
 import TimeRay from "../../objects/TimeRay"
 
 
-const INVALID_CHARACTERS = /[^0-9TZ:+-]/g
+const INVALID_CHARACTERS = /[^0-9TZ:+.-]/g
 
 
 /**
@@ -40,12 +40,14 @@ export default function FormInlineTimeRay(
 
     const _onSubmit = event => {
         event.preventDefault()
+        if(!value) return
+        console.debug(value)
         submit(new TimeRay(isBefore, new Date(value)))
         setValue("")
     }
 
     const _onChange = event => {
-        setValue(validate(event.target.value.replace(INVALID_CHARACTERS, "")))
+        setValue(validate(event.target.value.toUpperCase().replace(INVALID_CHARACTERS, "")))
     }
 
     return (
@@ -67,6 +69,7 @@ export default function FormInlineTimeRay(
                 icon={buttonIcon}
                 color={buttonColor}
                 onClick={_onSubmit}
+                disabled={!value}
             />
         </FormInline>
     )
diff --git a/nest_frontend/components/interactive/FormInlineUser.js b/nest_frontend/components/interactive/FormInlineUser.js
index 275e655..42ec2a8 100644
--- a/nest_frontend/components/interactive/FormInlineUser.js
+++ b/nest_frontend/components/interactive/FormInlineUser.js
@@ -9,12 +9,11 @@ const INVALID_CHARACTERS = /[^a-zA-Z0-9]/g
 /**
  * A {@link FormInline} allowing the user to select a Twitter user.
  *
- * @param submit - Function <string> called when the submit button is pressed.
  * @param props - Additional props to pass to the form.
  * @returns {JSX.Element}
  * @constructor
  */
-export default function FormInlineUser({ submit, ...props }) {
+export default function FormInlineUser({ ...props }) {
 
     const validate = value => {
         return value.replace(INVALID_CHARACTERS, "")
@@ -25,7 +24,6 @@ export default function FormInlineUser({ submit, ...props }) {
             textIcon={faAt}
             placeholder={"jack"}
             validate={validate}
-            submit={submit}
             {...props}
         />
     )
diff --git a/nest_frontend/components/interactive/PickerFilter.js b/nest_frontend/components/interactive/PickerFilter.js
index 478fe43..807081c 100644
--- a/nest_frontend/components/interactive/PickerFilter.js
+++ b/nest_frontend/components/interactive/PickerFilter.js
@@ -1,6 +1,14 @@
 import React, { useContext } from "react"
 import ButtonIconOnly from "../base/ButtonIconOnly"
-import { faAt, faClock, faFont, faHashtag, faLocationArrow, faMapPin } from "@fortawesome/free-solid-svg-icons"
+import {
+    faAt,
+    faClock,
+    faFont,
+    faHashtag,
+    faLocationArrow,
+    faMapMarkerAlt,
+    faMapPin,
+} from "@fortawesome/free-solid-svg-icons"
 import ButtonPicker from "./ButtonPicker"
 import ContextRepositoryViewer from "../../contexts/ContextRepositoryViewer"
 
@@ -45,7 +53,7 @@ export default function PickerFilter({ ...props }) {
                 currentTab={filterTab}
                 setTab={setFilterTab}
                 name={"place"}
-                icon={faLocationArrow}
+                icon={faMapMarkerAlt}
             />
             <ButtonIconOnly
                 onClick={() => {
@@ -54,7 +62,7 @@ export default function PickerFilter({ ...props }) {
                 }}
                 disabled={filterTab === "location"}
                 color={"Grey"}
-                icon={faMapPin}
+                icon={faLocationArrow}
             />
         </div>
     )
diff --git a/nest_frontend/objects/Coordinates.js b/nest_frontend/objects/Coordinates.js
index 10413f2..a27f965 100644
--- a/nest_frontend/objects/Coordinates.js
+++ b/nest_frontend/objects/Coordinates.js
@@ -1,6 +1,9 @@
 /**
  * A pair of coordinates, latitude `lat` and longitude `lng`.
  */
+import { LatLng } from "leaflet/dist/leaflet-src.esm"
+
+
 export default class Coordinates {
     lat
     lng
@@ -25,7 +28,7 @@ export default class Coordinates {
         if(!match) {
             throw new Error(`Invalid location string: ${str}`)
         }
-        return new Coordinates(match[0], match[1])
+        return new Coordinates(match[1], match[2])
     }
 
     /**
@@ -62,4 +65,13 @@ export default class Coordinates {
     toArray() {
         return [this.lat, this.lng]
     }
+
+    /**
+     * Transform this object in a {@link LatLng} / Leaflet compatible-one.
+     *
+     * @returns {LatLng}
+     */
+    toLatLng() {
+        return new LatLng(this.lat, this.lng)
+    }
 }
diff --git a/nest_frontend/objects/Filter.js b/nest_frontend/objects/Filter.js
index c8f8892..a18584c 100644
--- a/nest_frontend/objects/Filter.js
+++ b/nest_frontend/objects/Filter.js
@@ -59,9 +59,9 @@ export class Filter {
 export class FilterContains extends Filter {
     string
 
-    constructor(word, negate = false) {
+    constructor(string, negate = false) {
         super(negate)
-        this.string = word.toLowerCase().trim()
+        this.string = string.toLowerCase().trim()
     }
 
     check(tweet) {
@@ -85,7 +85,7 @@ export class FilterHashtag extends FilterContains {
     hashtag
 
     constructor(hashtag, negate = false) {
-        super(negate, `#${hashtag}`)
+        super(`#${hashtag}`, negate)
         this.hashtag = hashtag
     }