Measurement Location Customization

Question

Hello 
Motive: Add esri.Meters unit to existing Location  units in esri.dijit.measurement dojo.

I am working on esri.dijit.measurement dojo in Arcgis server. In  this, the available units for Location
 are "degrees and DMS". I want to add Meters unit in this. How can I do that. I am getting stuck in
this from yesterday. Anybody Please help me out, its very urgent.
Thanks in advance

adrian.marsden_DevonCC · Answer

To add to this.  Esri tend to take a world view of things, alas.

To many, such as us in the UK, we take a local view.  ALL our data is in WKID 27700 - British National Grid - which is a simpla(ish) XY system, in METRES (note spelling) from a point in the Atlantic.

The only co-ordinate system most of our users will ever come across  will be this.  They need to be able to give co-ordinates out in metres and be able to get them in.

Using Long Lats, or any other world projection just confuses the issue and I have to do conversions (in ArcIMS days 100+ lines of code, in AGS days, about 5)

So please can the Measurement Widget be set to use the co-ordinate system of the map and return in the units it uses.

Cheers

ACM

nitakumari · Answer

Nita, When we say a location is Longitude: -85.74, Latitude: 38.25, which means it's a point offset from Longitude: 0, Latitude: 0 on a sphere/ellipsoid (earth) surface under geographic coordinate system. If you want to use meters as unit, that means you want to represent the location in a 2D projected coordiante system from an origin point. Without projection information, it doesn't have a meaningful location x, y values. What I'm trying to say is you would like to show a meaningful location here. Back to your question, you can use the following code snippet to show the x, y values under current projection of your map. dojo.connect(measurement, "onMeasureEnd", function(toolName, geometry){ if (toolName === "location") { measurement.resultValue.domNode.innerHTML = "x: "+ geometry.x + "
y: " + geometry.y; } }); Hello Jian, Thanks for your reply. I have tested this code but its not working. I need to add esri.Meters in esri.dijit.measurement Location units. After adding this, I want to show measurement location by default in esri.Meters like below code measurement = new esri.dijit.Measurement({ map: map, lineSymbol: sls,defaultLengthUnit: esri.Units.METERS, defaultAreaUnit: esri.Units.SQUARE_METERS; defaultLengthUnit: esri.Units.METERS}, dojo.byId('measurementDiv')); but I am not having "esri.Units.METERS" in dropdownlist of units for location. So, I can I do that. Thanks in advance Nita

JianHuang · Answer

Nita, When we say a location is Longitude: -85.74, Latitude: 38.25, which means it's a point offset from Longitude: 0, Latitude: 0 on a sphere/ellipsoid (earth) surface under geographic coordinate system. If you want to use meters as unit, that means you want to represent the location in a 2D projected coordiante system from an origin point. Without projection information, it doesn't have a meaningful location x, y values. What I'm trying to say is you would like to show a meaningful location here. Back to your question, you can use the following code snippet to show the x, y values under current projection of your map. dojo.connect(measurement, "onMeasureEnd", function(toolName, geometry){ if (toolName === "location") { measurement.resultValue.domNode.innerHTML = "x: "+ geometry.x + "
y: " + geometry.y; } });