Show coordinates in multiple formats

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Sample viewer app

Format coordinates in a variety of common notations.

Images of Show coordinates in multiple formats

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

Tap on the map to see a marker with the tapped 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 marker 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.toLatitudeLongitudeOrNull(point = newLocation, format = LatitudeLongitudeFormat.DecimalDegrees, decimalPlaces = 4) to get the formatted string.
To go from a formatted string to a Point, use one of the "from" static methods like CoordinateFormatter.fromUtmOrNull(coordinates = coordinateNotation, utmConversionMode = UtmConversionMode.LatitudeBandIndicators, spatialReference = null).

Relevant API

CoordinateFormatter
CoordinateFormatter.LatitudeLongitudeFormat
CoordinateFormatter.UtmConversionMode

Additional information

This sample uses the GeoViewCompose Toolkit module to be able to implement a Composable MapView.

Sample Code

MainActivity.kt

MapViewModel.kt

CoordinatesLayout.kt

MainScreen.kt

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/* Copyright 2023 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.
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package com.esri.arcgismaps.sample.showcoordinatesinmultipleformats

import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Surface
import androidx.compose.runtime.Composable
import androidx.core.view.WindowCompat
import com.arcgismaps.ApiKey
import com.arcgismaps.ArcGISEnvironment
import com.esri.arcgismaps.sample.sampleslib.theme.SampleAppTheme
import com.esri.arcgismaps.sample.showcoordinatesinmultipleformats.screens.MainScreen

class MainActivity : ComponentActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        // authentication with an API key or named user is
        // required to access basemaps and other location services
        ArcGISEnvironment.apiKey = ApiKey.create(BuildConfig.ACCESS_TOKEN)
        // remove focus from text fields when keyboard closes
        WindowCompat.setDecorFitsSystemWindows(window, false)
        // set compose content
        setContent {
            SampleAppTheme {
                ShowCoordinatesInMultipleFormatsApp()
            }
        }
    }

    @Composable
    private fun ShowCoordinatesInMultipleFormatsApp() {
        Surface(color = MaterialTheme.colorScheme.background) {
            MainScreen(sampleName = getString(R.string.show_coordinates_in_multiple_formats_app_name))
        }
    }
}