Dear Joe,
Sorry I could not contact you on time since I was away from office for two days.
Presently I am working as a GIS Consultant in Tata Consultancy Services, New Delhi which is an Asia’s biggest software consultancy.
As a part of my doctoral program, I have written various C/C++ programs for contouring (Kriging/Inverse distance), DEM generation, watershed partition, slope, aspect map, drainage map, channel network extraction, sub-watershed delineation, channel ordering, time of concentration map generation etc. These programs were handling the raster data in byte binary format and header details were in ASCII format stored in a separate file. These programs are working in DOS environment and having its own GUI.
Recently, I am trying to port the application into window environment and converted into MI callable DLL’s. I selected a MI software as the core spatial DB engine for raster display so that it can be further integrated with vector data for further analysis. In this regard, I started exploring the suitability of image format which can be handled optimally grid kind of application in MI. Of course, there are lot of issues are yet to be resolved like suitability of image format, handling of float data format, display of raster/image in MI, control on color palette etc, as mentioned by Joe. I am urgently looking for some assistance to resolve these issues.
Joe, I feel it will be great help to us if you can share/extend your views/clues/tricks/leades in this regard by providing literature/programs/web site addresses etc. I am expressing my sincere thanks in advance to you.
With regards
Rajendra
From: Joe Berry <[EMAIL PROTECTED]>
To: Dr. Rajendra Kumar Gupta <[EMAIL PROTECTED]>
Date: Saturday, February 13, 1999 2:07 AM
Subject: Re: MI Re. Image format supported by MapInfo & suitable for water resource application......
Yep... but they have a long way to go to get the breadth of functions we have. I am also curious about their interest in graphics file formats-- they must be thinking of a hands-away integration with MI... pass grids as bit maps (not integrate processing using .MIG format). We still have a lead.JoeSounds like the grid-applications are coming to the MI arena... we need our line in the water soon.By the way, where are you?Joe-----Original Message-----
From: Dr. Rajendra Kumar Gupta <[EMAIL PROTECTED]>
To: MapInfo-L <[EMAIL PROTECTED]>
Date: Thursday, February 11, 1999 8:55 PM
Subject: MI Re. Image format supported by MapInfo & suitable for water resource application......We are in the process of developing an application for contour, DEM, Slope, Aspect, drainage, watershed generation etc in MapInfo. We have the DLL programs callable in MapInfo. These programs are supporting the byte binary format with separate header file (ASCII format) containing the details of the image file such as no of rows, no of columns, data type (integer/float etc.), maximum value, minimum value and other palette details. I want to change the image input/output format in such a way that these raster image file can be displayed in MapInfo. Through literature we found that there are vast number of image formats supported by MapInfo.Can someone help us in providing the following information-A) Which image format is most suitable for this kind of application?B) What is the way of handling the float data type in the raster image?C) Is there any web site where I can get the SPOT BIL format details?D) Can someone provide the program for reading/writing BMP files?I promise to made available these programs to everyone.Rajendra
