no man,
some function like
int ConvertGratitoPix(int d,int m,int s,int sf)
{
return d*60*60*100+m*60*100+s*100+sf;
}
here graticule in general means latitude and/or longitude.
pix refers to an integer.
-------------------------------------------- Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.
so, your towns bounds are as follows.
top-9104890 and left-19911107
bottom-9069257 and right-19945768
now, the width of your town is
19945768-19911107=34661
and height is
9069257-9104890 =-35633
temporarily we will ignore the - sign for height. theresult would be reversed display of the map. we will correct at the end.
finally,
width=34661
and
height=35633
did you understand till here.
if so i shall proceed further otherwise ask ur doubt.
be quick.
-------------------------------------------- Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.
good.
now
width=34661
and
height=35633
it is evident that, if we draw the abovepattern, it will be a rectangle, not a square.for our convinience we want to make it a square.
so out of width and height, which is more?
obviously height.
so we will subtract
height-width=35633-34661
=972.
means width is 972 units less than height.
so if we adjust 972/2 units to the left and 972/2 units to the right of our original rectangle, then it would become a square.
now, i want you to explain those caluculations for me.
do it fast.
-------------------------------------------- Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.
what happened are you there?
make a habbit of acknowleding my post after you read it.
later you can edit it with your comments.
i should atleast know weather u r on this job or some thing else?
-------------------------------------------- Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.
perfect
so can you caluculate the left,top,right and bottom of your town in terms of pix data such that it will be a square?
be fast.
ive got to leave for the day.
-------------------------------------------- Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.
19910639,9104890
19946236,9069257
this would be your town bounds.
-------------------------------------------- Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.
now, what is themaximum size of a square that you can draw on your screen?
that will be your drawing area of the map.
-------------------------------------------- Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.
-------------------------------------------- Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.
bye for today.
try to map the bounds of the town to the bounds of the rectangle on your screen.
then take the digital data that is set of longitudes and latitudes from ge for some of the roads,
i mean take a sample at each road turning,
put them sequentially in a file,
convert them into pix data,
scale them to the square on your screen,
plot lines from one point to other.
now u will see the map that u have extracted from ge.
now you should be able to plot the value you have received from ur usb gps device.
all the best
bye.
-------------------------------------------- Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.
what is the map yo are using?
please explain ur requirement in a bit more detail.
-------------------------------------------- Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.
sorry my friend,
i really have no idea on the format, which you are using.
here, in this thread, we were discussing on creating our own map format and our own map tool.
to solve your, problem, you may have to go through the api provided by the map tool which you are using.
first let me know, what tool you are using?
good luck.
-------------------------------------------- Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.
its for my class project actually, language is vc++, open street map is a free map provider and i exported the map of our city as png image and converted it into bmp. I know the top left corner latitude , longitude value and bottom right corner latitude longitude value. we got some gpx files of my city and want to plot it in this map. here we stuck dont know wht to do next....
did you try to open the gpx file in either notepad or vc++ binary editor and see the content?
if yes, please let me know what it contains. then i can guide you.
-------------------------------------------- Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.
1.does your map tool provide any api or function to plot a latitude or longitude?
2.are you displaying the map on the screen? if so, which control?
-------------------------------------------- Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.
Last Visit: 31-Dec-99 18:00 Last Update: 3-May-24 4:14
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
