View in QML C++ View on GitHub Sample viewer app
Format coordinates in a variety of common notations.
Use case
The coordinate formatter can format a map location in WGS84 in a number of common coordinate notations. Parsing one of these formats to a location is also supported. Formats include decimal degrees; degrees, minutes, seconds; Universal Transverse Mercator (UTM), and United States National Grid (USNG).
How to use the sample
Click on the map to see a callout with the clicked location's coordinate formatted in 4 different ways. You can also put a coordinate string in any of these formats in the text field. Hit Enter and the coordinate string will be parsed to a map location which the callout will move to.
How it works
Get or create a map Point with a spatial reference.
Use one of the static "to" methods on CoordinateFormatter such as CoordinateFormatter.toLatitudeLongitude(point, Enums.LatitudeLongitudeFormatDecimalDegrees, 4) to get the formatted string.
To go from a formatted string to a Point, use one of the "from" static methods like CoordinateFormatter.fromUtm(coordinateString, map.spatialReference, Enums.UtmConversionModeLatitudeBandIndicators).
Relevant API
convert, coordinate, decimal degrees, degree minutes seconds, format, latitude, longitude, USNG, UTM
FormatCoordinates.qml
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// [WriteFile Name=FormatCoordinates, Category=Geometry]
// [Legal]
// Copyright 2017 Esri.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [Legal]
import QtQuick
import QtQuick.Controls
import QtQuick.Layouts
import QtQuick.Window
import Esri.ArcGISRuntime
Rectangle {
width : 800
height : 600
readonly property int labelWidth : 100
readonly property int coordinateTextWidth : 200
readonly property int fontPixelSize : 14
readonly property int textPadding : Qt.platform.os === "android" ? 10 : 4
readonly property string strDecimalDegrees : qsTr( "Degrees" )
readonly property string strDegreesMinutesSeconds : qsTr( "DMS" )
readonly property string strUsng : qsTr( "USNG" )
readonly property string strUtm : qsTr( "UTM" )
property string labelSuffix : ": "
MapView {
id: mapView
Component.onCompleted : {
// Set the focus on MapView to initially enable keyboard navigation
forceActiveFocus();
}
anchors {
top : parent .top
left : parent .left
right : parent .right
bottom : formatRect.top
}
Map {
id: map
// set the basemap
Basemap {
initStyle : Enums.BasemapStyleArcGISImageryStandard
}
}
// Add a graphics overlay to the map view
GraphicsOverlay {
id: graphicsOverlay
// assign a render to the graphics overlay
SimpleRenderer {
SimpleMarkerSymbol {
style : Enums.SimpleMarkerSymbolStyleX
color : Qt.rgba( 1.0 , 0.0 , 0.0 , 1.0 )
size : 15.0
}
}
Graphic {
id: locationGraphic
Point {
x : -117.195723
y : 34.056195
SpatialReference {
wkid : 4326
}
}
onComponentCompleted : {
setTextFromPoint(locationGraphic.geometry);
}
}
}
onMouseClicked : mouse => { // on MapView
handleLocationUpdate(mouse.mapPoint);
}
}
Rectangle {
id: formatRect
anchors {
left : parent .left
bottom : parent .bottom
right : parent .right
}
height : childrenRect.height
GridLayout {
columns : 2
width : parent .width
Text {
id: labelDD
font.pixelSize : fontPixelSize
padding : textPadding
horizontalAlignment : Text.AlignRight
text : strDecimalDegrees + labelSuffix
}
TextField {
id: textDD
font.pixelSize : fontPixelSize
text : coordinatesInDD.length === 0 ? "invalid point" : coordinatesInDD
selectByMouse : true
Layout.fillWidth : true
onAccepted : {
handleTextUpdate(strDecimalDegrees, text);
}
}
Text {
id: labelDMS
font.pixelSize : fontPixelSize
padding : textPadding
horizontalAlignment : Text.AlignRight
text : strDegreesMinutesSeconds + labelSuffix
}
TextField {
id: textDMS
font.pixelSize : fontPixelSize
text : coordinatesInDMS.length === 0 ? "invalid point" : coordinatesInDMS
selectByMouse : true
Layout.fillWidth : true
onAccepted : {
handleTextUpdate(strDegreesMinutesSeconds, text);
}
}
Text {
id: labelUtm
font.pixelSize : fontPixelSize
padding : textPadding
horizontalAlignment : Text.AlignRight
text : strUtm + labelSuffix
}
TextField {
id: textUtm
font.pixelSize : fontPixelSize
text : coordinatesInUtm.length === 0 ? "invalid point" : coordinatesInUtm
selectByMouse : true
Layout.fillWidth : true
onAccepted : {
handleTextUpdate(strUtm, text);
}
}
Text {
id: labelUsng
font.pixelSize : fontPixelSize
padding : textPadding
horizontalAlignment : Text.AlignRight
text : strUsng + labelSuffix
}
TextField {
id: textUsng
font.pixelSize : fontPixelSize
text : coordinatesInUsng.length === 0 ? "invalid point" : coordinatesInUsng
selectByMouse : true
Layout.fillWidth : true
onAccepted : {
handleTextUpdate(strUsng, text);
}
}
}
}
function handleLocationUpdate ( point ) {
if (! point .isEmpty)
{
locationGraphic.geometry = point ;
setTextFromPoint( point );
}
}
function handleTextUpdate ( textType, text ) {
const point = createPointFromText(textType, text);
if ( point )
handleLocationUpdate( point );
}
function setTextFromPoint ( point ) {
if ( point .isEmpty)
return ;
//! [FormatCoordinates CoordinateFormatter point to text]
let decimalPlaces = 6 ;
textDD.text = CoordinateFormatter.toLatitudeLongitude( point , Enums.LatitudeLongitudeFormatDecimalDegrees, decimalPlaces);
decimalPlaces = 1 ;
textDMS.text = CoordinateFormatter.toLatitudeLongitude( point , Enums.LatitudeLongitudeFormatDegreesMinutesSeconds, decimalPlaces);
const addSpaces = true ;
textUsng.text = CoordinateFormatter.toUsng( point , 5 , addSpaces);
textUtm.text = CoordinateFormatter.toUtm( point , Enums.UtmConversionModeLatitudeBandIndicators, addSpaces);
//! [FormatCoordinates CoordinateFormatter point to text]
// check for invalid points and update the text boxes
if (textDD.text.length === 0 )
textDD.text = "invalid point" ;
if (textDMS.text.length === 0 )
textDMS.text = "invalid point" ;
if (textUsng.text.length === 0 )
textUsng.text = "invalid point" ;
if (textUtm.text.length === 0 )
textUtm.text = "invalid point" ;
}
function createPointFromText ( textType, text ) {
if (strDecimalDegrees === textType
|| strDegreesMinutesSeconds === textType) {
//! [FormatCoordinates CoordinateFormatter text to point]
return CoordinateFormatter.fromLatitudeLongitude(text, map.spatialReference);
//! [FormatCoordinates CoordinateFormatter text to point]
}
if (strUsng === textType) {
return CoordinateFormatter.fromUsng(text, map.spatialReference);
}
if (strUtm === textType) {
return CoordinateFormatter.fromUtm(text, map.spatialReference, Enums.UtmConversionModeLatitudeBandIndicators);
}
}
}
