Read The Latitude And Longitude Byte Values From The DEM File (retrieving Binary Values)?
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
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:
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:
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] .....
I have a device with upon serial communication , it send the data as HEX values , (eg, C020042ABD0F91A103E400F929EBC) . I use the following code to get data from the serial port.
Dim fStream As New FileStream(sFileName, FileMode.CreateNew) ' creates new file Dim bw As New BinaryWriter(fStream) System.Threading.Thread.Sleep(1500) ComTd.Read(data, 1, bCount)
I have a device with upon serial communication, it send the data as HEX values, (e.g., C020042ABD0F91A103E400F929EBC). I use the following code to get data from the serial port.
Dim fStream As New FileStream(sFileName, FileMode.CreateNew) ' creates new file Dim bw As New BinaryWriter(fStream) System.Threading.Thread.Sleep(1500) ComTd.Read(data, 1, bCount) Dim bCount As Integer = 4119 ' it is the size of the chunk not block size Dim data(bCount) As Byte [Code] .....
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]...
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]....
Some binary files have application variables at the end if you open it with a text editor you can see these variables. Now when I read these files into the processor memory the program does not work properly, however if I read a file without this it works fine. So how can I read a byte[] array to EOF so that when I pass that byte array into win32 api create-process it will create the process without corrupting the program?
I am trying to read a 16bit binary file (tif image) and pixel values of the image ranges from 1200 to 4500. I tried to use BinaryReader using ReadUInt16 but I get EndOfStreamException Unhandled error. ReadByte method works fine with an 8bit tif file. I do not know how to read a 16bit image file using binaryReader. Shouldn't I use ReadUInt16 since values of pixels range from 1200 to 4500?
How would I copy/convert a string containing an ascii representation of hex values in to a byte array containing the actual hex values? For example, I have a variable containing the hex values delimited by spaces (I can change the delimiter):
I'm trying to read the binary data from a binary file with the code below but the it's return the value in the byte array. How can i read the binary data from the binary file and then convert the data into string?This is how i create the binary file.
Dim fs As New FileStream(Application.StartupPath & "Agency.dat", FileMode.OpenOrCreate) Dim bf As New BinaryFormatter() Call bf.Serialize(fs, GAgency)[code]....
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
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.
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:
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.
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].
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?
Dim swQuotation As StreamWriter = New System.IO.StreamWriter(QCHome.QCQuotationsFile, True) ' Otherwise, write the data to the file swQuotation.WriteLine(QuoationsCustIDTextBox.Text + ":" + QuotationIDtextbox.Text + ":" + ETC.... ETC...
I want to be able to retreive the Value of QUOTATIONID saved in the file, in another form, but i can't seem to get anywhere with it, and its bugging me.The following code Doesn't work, when it should :
'For Multiple Quotations. Dim Quotationlines() = File.ReadAllLines(QCHome.QCQuotationsFile) For i = 0 To Quotationlines.Count() - 1
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.
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.
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?
I've got a problem saving asci Values to File as Byte. I must save hex values to file, for this case i used the following line: fs.WriteByte(&H2D) This works fine, but i need to do this autmaticly. My Sourcestring is 2995030. Tried to do something like &H(Hex(str)), but this failed.
I am attempting to read a series of double prcision float values (x,y,z coordinates) from a binary file using the binary reader. Everything works fine except that when I read the number back it is different then the number that was written there (original file is generated by mining application).
written number : 78897.6476586 file contents hex : 40 F3 43 1A 5C CF 43 A4 this converts back to the same number as written using a IEE 754 conversion program. VB returned value : -5.45100266729248E-134 using .readDouble()
I have tried to step thru the file in one byte steps to make sure that I have the proper start position but that did not help any.
