topic Coordinate System Transformation to NAD83 using C#/.NET in ArcObjects SDK Questions https://community.esri.com/t5/arcobjects-sdk-questions/coordinate-system-transformation-to-nad83-using-c/m-p/56024#M1511 <HTML><HEAD></HEAD><BODY><SPAN>I am currently working on a ASP.NET web application that allows users to upload shapefiles to store data in the database. For everything to work smoothly, I need the coordinate system to be NAD83, is it possible for me to convert whatever coordinate system is being uploaded to NAD83 format? I am ArcObjects SDK for .NET installed, but my knowledge about GIS is very minimal (first time working on a GIS-based application). I have the following files: shp, dbf, prj, shx and sbn for each feature. If anyone has ideas on how to go about doing something like this, I would greatly appreciate the help.</SPAN></BODY></HTML> Wed, 31 Jul 2013 19:15:10 GMT KeyurPatel 2013-07-31T19:15:10Z Coordinate System Transformation to NAD83 using C#/.NET https://community.esri.com/t5/arcobjects-sdk-questions/coordinate-system-transformation-to-nad83-using-c/m-p/56024#M1511 <HTML><HEAD></HEAD><BODY><SPAN>I am currently working on a ASP.NET web application that allows users to upload shapefiles to store data in the database. For everything to work smoothly, I need the coordinate system to be NAD83, is it possible for me to convert whatever coordinate system is being uploaded to NAD83 format? I am ArcObjects SDK for .NET installed, but my knowledge about GIS is very minimal (first time working on a GIS-based application). I have the following files: shp, dbf, prj, shx and sbn for each feature. If anyone has ideas on how to go about doing something like this, I would greatly appreciate the help.</SPAN></BODY></HTML> Wed, 31 Jul 2013 19:15:10 GMT https://community.esri.com/t5/arcobjects-sdk-questions/coordinate-system-transformation-to-nad83-using-c/m-p/56024#M1511 KeyurPatel 2013-07-31T19:15:10Z Re: Coordinate System Transformation to NAD83 using C#/.NET https://community.esri.com/t5/arcobjects-sdk-questions/coordinate-system-transformation-to-nad83-using-c/m-p/56025#M1512 <HTML><HEAD></HEAD><BODY><SPAN>Yes you can convert the coordinates between different systems.&nbsp; You must know the coordinate system of the source data though.</SPAN><BR /><SPAN>If you know the spatial reference of the source just plug it in below along with the source x/y coordinates (via "PutCoords").&nbsp; Once you execute the "Project" method with the desired spatial reference, you can query the X, Y (via "QueryCoords") to get the new coordinates.</SPAN><BR /><BR /><PRE class="lia-code-sample line-numbers language-none">Dim NewPoint As ESRI.ArcGIS.Geometry.IPoint = New ESRI.ArcGIS.Geometry.PointClass NewPoint.SpatialReference = _sourceSpatialReference NewPoint.PutCoords(SourceX, SourceY) NewPoint.Project(_desiredSpatialReference) NewPoint.QueryCoords(X, Y)</PRE></BODY></HTML> Fri, 10 Dec 2021 22:08:02 GMT https://community.esri.com/t5/arcobjects-sdk-questions/coordinate-system-transformation-to-nad83-using-c/m-p/56025#M1512 DavidClarke1 2021-12-10T22:08:02Z