Convert Double To Decimal (latitude / Longitude) In .net?
May 24, 2012
I have a piece of code:
Dim Latitude As Double = row("fltLatitude")
Dim Longitude As Double = row("fltLongitude")
Most of the lat/longs that are being fetched from the db using SP are retrieved in properly, except for a couple of records which do not include a period to indicate a lat/long value.I have tried using these:
Convert.ToDecimal(Latitude)
CDec(Latitude)
decimal.Parse(Latitude)
but none of them are working.
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Mar 22, 2012
i have a decimal number like 35,23456834 the rapresent a latitude or longitude (in degree but with decimal form for the decimal )
My need is to transform that number in xx° - xx' - xx'' in a variabli of string
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May 30, 2011
Create a function named DecimalDegrees to refactor the code that converts a latitude or longitude into a value in decimal degrees. (This function will be used inside the functions ValueOf and Distance.)
Task 2a: Write the code for the function DecimalDegrees with an input parameter for DegreeString as type string, and returns the value as type Double.
Here is my code for the function part
Private Function DecimalDegrees(ByVal DegreeString As String, ByVal degrees As Double, ByVal minutes As Double,
ByVal seconds As Double, ByVal ID As Integer) As Double
I am having difficulties with the 2nd part which is I believe to take the code for the calc1 and calc2 buttons and somehow get it to convert to decimal degrees by the function I have created. The buttons would then be removed as the code would automatically take the latitude and longitude and convert the degrees, minutes and seconds into a decimal.
Here is the code for the current buttons:
Dim StartPtr, StopPtr As Integer
'To Replace Calculator 1 Button
'Convert degrees before passing argument - Latitude
StartPtr = 0
[Code] .....
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Jul 18, 2012
I would like to know about convertion from (x, y) to (latitude, longitude)?
For Example:
In my project(windows form - VB.NET) i have a Panel (control) and have a MouseMove Event then when i moving the mouse it have a location such as:
Label1.text = e.X
Label2.text = e.Y
So how to convert it to?:
Label1.text = Latitude(e.X)
Label2.text = Longitude(e.Y)
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Mar 18, 2009
I want to convert British OSGB 36 co-ordinates to WGS 84 (i.e. "standard" latitude and longitude), in order to plot them into a KML file for Google Earth.I should probably add that my question is not "How do I write a KML file?". My question is "How do I convert between these 2 co-ordinate systems?"!!I was hoping there would be a library that I could use, rather than rolling my own function - it seems like the sort of thing some-one else would have implemented.
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Nov 25, 2011
I'm trying to make a longitude and latitude converter. I use Google maps to get longitude and latitude for my handheld GPS but there longitude and latitude is a different type then my GPS uses. I have to convert it before putting it in my GPS.
I made a very simple program using VB 2008 that open up right to Google maps and at the top of the program i want to put the converter.
I have done a lot of research and still i am not able to wright a code that will do the conversion. For the conversion Need to multiply the decimal part of the longitude and latitude by 60
For example if i had 40.313043,-97.573244 I would multiply .313043 by 60 witch = 18.78258 and then i would multiply .573244 by 60 witch = 34.39464 The finale longitude and latitude would be 40 18.782, 97 34.394
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Dec 18, 2009
how to retrive longitude and latitude, perhaps even diaplay several address on a map, be it google yahoo mapquest??
I want to add a feature that takes 6 propertys(houses) and measures the distance from each to the users location
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May 16, 2012
I'm developing a database in VB.NET-Code First. I would like to add Latitude and Longitude to both Locations and Postal Codes. Right now i'm adding a GeographicCoordinate to each class.
[Code]...
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Nov 21, 2011
Is it possible to get latitude and longitude coordinates from an address in a vb.net application?
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Mar 19, 2010
I'm looking to create a csv file of image_names, latitude, and longitude extracted from EXIF headers of several jpegs. I'm having trouble parsing the lat and long byte array items to decimal or ascii. Here is what I have so far.[code]...
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Nov 29, 2010
I am new to vb.net, but i have good knowledge in Vb. I have a set of latitude and longitude, I need to find which county this set belongs to.
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Mar 26, 2009
I have a HDR file and DEM file,I want to generate the Latitude and Longitude values from the header file.Where that values are is used to list the elevation values from the DEM file.The file contains the data's like:
BYTEORDER M
LAYOUT BIL
NROWS 6000
NCOLS 4800
[code]....
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Jun 10, 2010
In need vb6 program Works with GPS. I want this program to works with GSM Modem, which is receiving a SMS Inside the message the longitude and latitude. I want the program view the coordinates on the map in [URL].
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Apr 19, 2012
I have a HDR file and DEM file,I want to generate the Latitude and Longitude values from the header file.Where that values are is used to list the elevation values from the DEM file.The file contains the data's like:
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Feb 15, 2010
I have a table with long/lat values and another table with a project-id and long/lat/radius (circle).Now I need to find out which project matches the long/lat values from the first table.Is there an easy way to do that?
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Nov 27, 2011
If there is a formula to change a latitude and longitude into a single number? I plan to use this for a database table in software that provides routing for deliveries. The table row would have that number as well as the postal address. The database table would be sorted in ascending numeric order so the software can figure out which address the truck would need to go to first, second etc.
For example I would use the following numbers for the latitude and longitude:
Lat = 40.71412890
Long = -73.96140740
Additional Information: I'm developing an Android app using Basic4Android. Basic4Android uses a VB or VB.Net syntax with SQLite as the database. Part of this app will have route planning. I want to use this number as the first column in an SQLite table and the other columns will be for the address. If I do a query within the app that sorts the rows in numerical ascending order, I will be able to figure out which postal address are closest to each other so it will take less time for me to go from house to house.
For example, if the numbers were:
194580, 199300, 178221
I can go to postal address 178221 then to 194580 and finally to 199300 and I won't need to take the long way around town to do my deliveries after they were sorted. As an alternative, I would be happy if there was an easy way to call a web service that returns maybe a json response that has the single number if I send a postal address to the web site. Basic4Android does have http services that can send requests to a web site.
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Jan 24, 2011
calculate the gps coordinates of points of a specific distance, namely 22 feet apart, on the circumference of a circle. I know the beginning gps coordinates and the radius. I am pretty sure the haversine, or the speherical law of cosines has the answer, but its been a long time since I have used any trig formulas and I cant figure it out. I am using decimal degrees and am programing in this vb.net.
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Apr 28, 2011
I have scanned a map which was in UTM WGS 84 projection system. The scanned map is now in jpg format and loaded into picturebox. If I select a point, how could I know that point's latitude and longitude? How could I integrate a projection system over the image displayed in picturebox?
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Apr 2, 2009
I need to display or get the elevation value of a given latitude and longitude from the DEM file in 11x11 matrix array.Actually I have a DEM file and corresponding HDR file of it.And, the DEM file is 6000x4800 Matrix with 57600000 data's.Now, I worked with some codes where I can able to get the elevation of a Given latitude and longitude.But, When I Zoom IN or OUT,the Latitude and Longitude values changes so,when I pass the changed latitude and Longitude value,I could not able to get the elevation value.The reason is,
In the 6000x4800 matrix the Resolution of the X and Y is large,so when we Zoom IN or OUT the resolution changes and could not display the elevation value.But, where as if we get the elevation values in 11x11 matrix array,since it has 121 data's only, the resolution value will be small and even when we Zoom IN or OUT and pass the changed Latitude and Longitude, we could able to get the elevation.[code]....
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Apr 22, 2011
How can I read Longitude and Lagitude from photo taken on Windows phone 7 Samsung?
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Oct 5, 2011
Let's say I want to convert a Double x to a Decimal y. There's a lot of ways to do that:
1. var y = Convert.ToDecimal(x); // Dim y = Convert.ToDecimal(x)
2. var y = new Decimal(x); // Dim y = new Decimal(x)
3. var y = (decimal)x; // Dim y = CType(x, Decimal)
4. -- no C# equivalent -- // Dim y = CDec(x)
Functionally, all of the above do the same thing (as far as I can tell). Other than personal taste and style, is there a particular reason to choose one option over the other?
EDIT: This is the IL generated by compiling the three C# options in a Release configuration:
1. call valuetype [mscorlib]System.Decimal [mscorlib]System.Convert::ToDecimal(float64)
--> which calls System.Decimal::op_Explicit(float64)
[Code]....
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Mar 23, 2009
I have a DEM file(Digital Elevattion Model File) and I am trying to open the file,where we have Latitude and Longitude values inside the DEM file.And, Now I have opened the file using Filestream and Read the file using BinaryReader.But, I am having a trobule in getting the values of Latitude and Longitude.I am getting Byte values randomly as 1,202,31,271 etc.But, we dont have latitude and longitude values more than 180,and also I am not getting 16 bit UInt values.For example, the values should be like Latitude 20.00416666666667 and Longitude 39.99583333333333.So,read the correct Byte values of the DEM file.The code I have used till now is:
Dim fs As FileStream = New FileStream("C:UsersadminDesktopHeader and DEM fileE020N40.DEM", FileMode.Open, FileAccess.Read)
Dim rd As New BinaryReader(fs)
Dim convertDB As UInt16
For i = 0 To rd.BaseStream.Length
[code]....
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Aug 15, 2011
For greater accuracy I should use a Decimal instead of a Double ( so I've been told ). Why then have Microsoft chosen to use DOUBLE for most of the functions that return a floating point value in the Math Class?
[Code]....
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Mar 30, 2011
If I have the code:Dim x as Decimal = 100.0m
Is it casting from a double to a decimal implicitly. How would I do this explicitly in vb.net?
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Dec 20, 2010
how do you convert a decimal ( decimal place holder = dot) to a decimal (decimal place holder =comma)?
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Jun 30, 2009
I am working on an application that allow the user to store data as numbers.These numbers are later on used for calculation. The number can be of any type and are saved as string. The problem is when they are used for calculation how can understand when it is better to treat them as doubles and when as decimals?
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Jan 6, 2012
How come a double and decimal treat 3 and 3.0 and 3.00 different?
For example:
Dim dbl As Double = 1 / CInt(TextBox1.Text)
MsgBox(dbl)
If I enter 3 in the TextBox I get: 0.33...
If I enter 3.0 I get: 0.033...
If I enter 3.00 I get: 0.0033...
How do I treat them all as 3?
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Jun 9, 2011
So, yes, I've tried with these three formats, and the problem remains the same:I have a string, "s"For Each s As String In stringarray and this array is recieving data from a streamreader that is reading a csv file. The data I'm having dificulty reading are these very specific numbers(yes, only these numbers, because phone numbers get home safe and sound).The numbers I'm talking about are usually decimal.ValueList.Add(Convert.ToDecimal(s))
Now, when I convert them like that, they always bring a "D" alongside with them. I've personally checked the string multiple times, and it just has a "1", and somehow, my list recieves "1D" as a number, same thing happens with decimal numbers(0.29D for example). I've tried with Doubles and Integers, the result is the same.
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Jan 1, 2012
here is a very important matter to be corrected as soon as possible. generally,type double can display an answer correct to more than 20 decimal places. yes,it works fine until here except for exponential system. whenever i try to find a decimal raised to the power of a proper fraction, i get a correct answer but only upto 13 decimal places. that is not fair at all! it is important to get as high precision as possible. consider this example:-
[code...]
i want that number of correct decimal places or approximation,which a windows 7 calculator has. i believe that this is someway easy to get rid of. please support.it is important for programs like calculator,worksheets,databases,etc.
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Feb 11, 2009
I am writing a program that asks the user for their name and the number of pieces they completed. The employees are paid more depending on the amount of pieces they have completed(i.e. <200 = .50 per piece, 200 to 399 = .55 per piece, etc.). I have to display the amount earned when the user enters the info and hits the calculate button. I have to use Select Case.
I was thinking this would be an easy program but I keep getting an error for each Case saying "Option Strict On disallows implicit conversions from 'Double' to 'Decimal'. I don't understand why it thinks it is a double. It says I can correct this problem by adding "Cdec" before each equation(i.e.
[Code]...
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