Re: MI Map Projection
I do not understand what you are asking for. Please explain more. What is your name? Are you asking for the parameters of the Johore Grid or what? Malaya went to the Rectified Skew Orthomorphic system many decades ago. Are you sure you need the Cassini-Soldner stuff? Are you on the Revised Kertau Datum or the Old Indian 1916? Hmm? Cliff Prof. Clifford J. Mugnier ([EMAIL PROTECTED]) Surveying, Geodesy, Photogrammetry LOUISIANA STATE UNIVERSITY 12408 CEBA Building Baton Rouge, LA 70803 Voice Facsimilie: (225) 388-8536 == SEE: http://www.ASPRS.org/resources.html == If Anybody out there knows what are the projection do Malaysian used to customised their Cassini-Soldner Projection All I know Cassini-Soldner is an Equirectangular projection and there's no info about this projection in Mapinfo projection help section. -sopax- Gis Data Integrator World COM.com -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
Re: MI Geoid model Greenland
EGM96 covers the entire world, what about that? It used to be available at the National Geodetic Survey web site as well as at the NIMA web site. Plus, it's free. Prof. Clifford J. Mugnier ([EMAIL PROTECTED]) Surveying, Geodesy, Photogrammetry Dept. of Civil Environmental Engineering LOUISIANA STATE UNIVERSITY 12408 CEBA Building Baton Rouge, Louisiana 70803 Voice: (225) 388-8536 Facsimilie (225) 388-8652 == SEE: http://www.asprs.org/resources.html == Hi, Who can help me? I need a Geoid model of Greenland. Thanks, Peter -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED] -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
MI Republic of Taiwan - GRIDS DATUMS
Kim Ollivier Ollivier Company New Zealand Dear Kim, In regard to your direct message to me of last week and later posting to the GIS-L on 12 Jun, the early records of survey work in Formosa date back to a Japanese Hydrographic Department survey of the west coast in 1897. Between 1900 and 1904 the Government General of Formosa under the supervision of the Japanese Government established approximately 2,000 stations. Japanese Imperial Land Survey initiated their work on a first-order net in Formosa in 1909. The system for this and succeeding lower-order triangulation is the Koshizan 1906 Datum where the origin is at station Koshizan where Latitude = 23* 58' 32.3400 North, and Longitude = 120* 58' 25.9750" East of Greenwich,and the initial azimuth is to south end of Horisha base where az = 243* 47' 21.611". Of course, the ellipsoid of reference is the Bessel 1841; the same as the Tokyo Datums of the 19th and 20th centuries. The Grid system is/was known as the Formosa Grid (since merely renamed the Taiwan Grid), and is the Gauss-Schreiber Transverse Mercator. Note that this is the double projection that first is transformed to the equivalent sphere before ellipsoidal correction terms are added so the projection is not perfectly conformal as is the Gauss-Kruger used for UTM. The Formosa/Taiwan TM Latitude of Origin is = 23* 40' 00.000" North, Central Meridian is Longitude = 120* 58' 25.9750" East of Greenwich. (No False Easting or False Northing were used, per the Japanese way of doing things). Note that the Japanese STILL do not use False Easting or False Northing for their Civil Grid of Japan in a kazillion different zones!! They really do use negative numbers for both X and for Y coordinates when they fall in the appropriate quadrants. They may have assigned False Eastings for their own convenience for civilian applications in Taiwan since WWII. If your value of 450 km is the range of eastings for your maps in-hand, it's likely at the Central Meridian listed above. The military of the Republic of Taiwan uses the Hu-Tzu-Shan Datum of 1950 and it is referenced to the International ellipsoid. For military applications, they use the UTM. Considering who is snarling at them on a regular basis, I do not expect to get much more info on geodetic reference systems for Taiwan in the near future. If you scrounge anything, I'd appreciate a copy. Don't get hanged for espionage! Sorry it took me a while to look this up for you; I was at a Pistol Match with my youngest son (18yrs) and my youngest daughter (12yrs). Only family or pistols take precedence over Grids and Datums. In this case it was both! Consider joining the American Society for Photogrammetry and Remote Sensing. I strongly recommend it. Clifford J. Mugnier ([EMAIL PROTECTED]) Surveying, Geodesy, and Photogrammetry LOUISIANA STATE UNIVERSITY 12408 CEBA Building Baton Rouge, Louisiana 70803 Voice and Facsimilie: (225) 388 - 8536 -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
MI RE: The Puzzle of Austria
Brian, Simple answer: The U.S. Army Map Service adjusted Austria to the European Datum 1950 (International ellipsoid) in 1951. There's an enormous amount of history on Austrian Geodesy and Mapping, but I think that answers your question succintly. AMS did the entire computation on the UTM Grid. See my column on Belgium in "Photogrammetric Engineering and Remote Sensing." Past columns of mine can be downloaded from: http://www.asprs.org/resources.html Look under "Grids and Datums." (I think Belgium is available there). Clifford J. Mugnier ([EMAIL PROTECTED]) The Topographic Engineering Laboratory Department of Civil and Environmental Engineering UNIVERSITY OF NEW ORLEANS New Orleans, Louisiana 70148 Voice and Facsimilie: (504) 280-7095 On Saturday, 26 February, 2000 11:10 PM, Brian wrote: Cliff I sincerely apologize for the intrusion, but I figure that if anyone knows the answer, it is you. Austria joined the UTM standard in 1997 after joining NATO yet a 1951 map of Kufstein/Tyrol Austria, made in 1951 and presented to a professor of mine by the Geography Department at the University of Salzberg was created using the UTM standard for the time. Any ideas other than the U.S. military had implemented UTM at the time and were probably influencing the region as a result of their occupation of Germany. Thanks for any assistance. Brian -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
RE: MI lambert conical orthomorphic
There is no single British Grid that covers all of India. For Large-Scale mapping, there are seven (7) individual Lambert Zones. (That is a necessity for geodetic surveying applications.) You must be working with a small-scale thematic base. I do not work with that sort of thing; I'm afraid that thematic mapping is not in my purview. The distortions that would be introduced as a result of a wrong guess on standard parallels would be insignificant for all practical purposes. If you are looking at a single map of all of India, I doubt that even the "proper" ellipsoid choice would have any effect at all. Sorry. Clifford J. Mugnier ([EMAIL PROTECTED]) The Topographic Engineering Laboratory Department of Civil and Environmental Engineering UNIVERSITY OF NEW ORLEANS New Orleans, Louisiana 70148 Voice and Facsimilie: (504) 280-7095 On Thursday, 24 February, 2000 10:32 PM, Dr Rajeev saraf wrote: Thanks for the reply. the limits are: lat 72 to 96 degrees and long: 8 to 36 degrees covers whole of india. thanks again. -- rajeev saraf -Original Message----- From: Clifford J. Mugnier [EMAIL PROTECTED] To: 'Dr Rajeev saraf' [EMAIL PROTECTED]; mapinfo- [EMAIL PROTECTED] [EMAIL PROTECTED] Date: Thursday, February 24, 2000 7:14 PM Subject: RE: MI lambert conical orthomorphic Lambert Conical Orthomorphic is the British term for Lambert Conformal Conic. The Brits introduced it in the Survey of India in the early 1900's. Captain Martin Hotine was the Geodesist that did it - he was one of the "Giants of Geodesy." There are numberous secant zones (2 standard parallels). India is a BIG place. Exactly what are the limits of Latitude and Longitude of the map you have in hand? Clifford J. Mugnier ([EMAIL PROTECTED]) The Topographic Engineering Laboratory Department of Civil and Environmental Engineering UNIVERSITY OF NEW ORLEANS New Orleans, Louisiana 70148 Voice and Facsimilie: (504) 280-7095 On Thursday, 24 February, 2000 12:33 AM, Dr Rajeev saraf [SMTP:[EMAIL PROTECTED]] wrote: HellO evrybodY: i have a map of india which says that the projection is "lambert conical orthomorphic". can somebody suggest the projection in MI list that matches with this projection or the parameters required to create new projection -- thanks Rajeev saraf lepton software [EMAIL PROTECTED] File: ATT00013.htm -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
MI Bulgarian Projections
Brendan, The four old datums are New Bulgarian 1928, Observatorio Astronomico Militari Bucharasti, New Romanian 1930, and Kustendil. I would guess the most recent is the "System 42" based on the Krassovski ellipsoid. I have an Astro position, "Chernyy Verkh" at Lat = 43* 33' 54.55"N Lon = 23* 16' 51.96"E which is the origin point of the New Bulgarian Datum of 1928, and is referenced to the International ellipsoid. If they followed the lead of the Romanians and the Poles, this is the origin of the new 1970 system in Bulgaria. The Romanian Planuri Directuri (sp?) Lambert Conformal Conic is on the Observatorio Datum and is referenced to the Clarke 1880 Romanian modified ellipsoid. The "Kronstadt Oblique Stereographic of 1934" is on the New Romanian Datum of 1930, and the math model of the projection is the Rousilhe Stereographic favored by the French Navy. (Internaitonal ellipsoid again.) In 1970, the Romanians picked up the Hristow math model in "Stereo 70." The rest is like I said, G-K TM. No polyconics. In 1970, the Poles and the Romanians BOTH picked up the Hristow Oblique Stereographic. If the Bulgarians did something strange, my guess would be the Hristow, not the Polyconic. It looks like a conic projection on a large-scale topo map and is frequently mistaken for Lambert or Polyconic. Stereographic is the standard projection and Grid for circularly shaped countries all over the world. I would think that the Warsaw Pact dudes read the same books as me ... Oh, and by the way, Prof. Hristow was Bulgarian. He wrote in German, he published in Austrian geodetic stuff, but he taught in Sofia. I don't think they EVER used Hassler's Polyconic. Maybe Lallemond's Polyconic for IMW stuff before WWII. Clifford J. Mugnier ([EMAIL PROTECTED]) The Topographic Engineering Laboratory Department of Civil and Environmental Engineering UNIVERSITY OF NEW ORLEANS New Orleans, Louisiana 70148 Voice and Facsimilie: (504) 280-7095 - On Wednesday, 23 February, 2000 2:26 AM, Brendan wrote: Cliff, Many thanks for the response, I will endeavour to get more data from my contacts. All I know about the 1970 system came in an email, this is the relevant bit "The official projection used in Bulgaria is called SYSTEM 1970 and is some kind of polyconic projection with secret parameters. Although we have been trying to get a clue on what these might be for something like 3 years we couldn't get any information on that from the Military Topographic Service and other institutions. However, there is a large number of (in theory) secret black box programmes that would convert your data in either LL or some other global projection." I do not have any of these "black boxes" but will try to get some. Probably very naively, I read your your Uzbekistan paper and assuming USSR/ Warsaw pact monolith worked out the two UTM type projections with the Krassovsky and the central scale factor of 1 which might be applicable to Bulgaria. I will look again in PERS for the Four datums in Bulgaria to which you allude (or should I look elsewhere ?). I would certainly like to contact you again if and when I can get any more concrete information Thanks again Brendan -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
MI RE: Datums and Projections
Brendan, I have zero on the use of the Polyconic in Bulgaria unless you are diddling with 1:1,000,000 International Map of the World (IMW) stuff. If that is so, then what you have is the standard IMW Lallemond Polyconic. The Russian Verst Maps (1891) were on the Polyhedric Projection at 1:126,000 scale, but other than being in the same screwy projection "family" of aphylactics, there is no similarity to the Polyconic. For info on the Polyhedrics (Polyeder in Dutch and German), see my past columns in PERS. I do not know if MapInfo supports that projection. Otherwise, everything I can find in Bulgaria is Gauss-Kruger Transverse Mercator. Four Datums, but all on G-K TM. I have never heard of the Bulgarian 1970 System. Send me some info and maybe I can help you. Clifford J. Mugnier ([EMAIL PROTECTED]) Geodesy, Photogrammetry, Surveying Department of Civil and Environmental Engineering LOUISIANA STATE UNIVERSITY Baton Rouge, Louisiana 70803 Voice: (225) 388-8536 - Clifford J. Mugnier ([EMAIL PROTECTED]) The Topographic Engineering Laboratory Department of Civil and Environmental Engineering UNIVERSITY OF NEW ORLEANS New Orleans, Louisiana 70148 Voice and Facsimilie: (504) 280-7095 --- On Monday, 21 February, 2000 11:44 AM, Brendan wrote: Dear Mr Mugnier, I read your mails in the MI user group regarding MI Datums and have visited asprs.org and the intimidating (by virtue of volume) NIMA.mil. I am mailing you from Ireland so I trust concerns about secrecy are academic, however if you wish I will send you my PGP public key. I am interested in the Bulgarian System 1970 projection which I believe is polyconic and secret, data on the older 1950 system and the 1:25000 scale map series would also be welcome. Any general or specific advice would be most welcome. regards Brendan -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
RE: MI Iranian Datums
Nahrwan, System 42, Indian 1916, and Busheir Clifford J. Mugnier ([EMAIL PROTECTED]) The Topographic Engineering Laboratory Department of Civil and Environmental Engineering UNIVERSITY OF NEW ORLEANS New Orleans, Louisiana 70148 Voice and Facsimilie: (504) 280-7095 On Friday, 18 February, 2000 6:28 PM, Tim Warman [SMTP:[EMAIL PROTECTED]] wrote: File: ATT4.txt; charset = Windows-1252 -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
RE: MI Datums
Old columns of mine (including Uzbekistan) can be downloaded (for free) from the "Grids and Datums" section at: http://www.asprs.org.resources.html Be careful what you say in public (over the internet) about System 42. It is still a State Secret in your country, and the authorities are strict about that topic. Another site that could help you is the U.S. military mapping organization (it is unclassified, and available to anyone over the internet). http://www.NIMA.mil Lots of stuff can be downloaded for free (from that site) in regard to WGS84 Datum relations with other "Local" Datums like System 42. Clifford J. Mugnier ([EMAIL PROTECTED]) The Topographic Engineering Laboratory Department of Civil and Environmental Engineering UNIVERSITY OF NEW ORLEANS New Orleans, Louisiana 70148 Voice and Facsimilie: (504) 280-7095 - On Thursday, 17 February, 2000 3:52 AM, 52 [SMTP:52@mail .ru] wrote: Hello List, Can any body explain to me what is datum, and where can i change it in MapInfo. As i undestand datum transformatin needed only when i want to jump from one ellipsoid to another. Is it right? I've found some information about datum i need (Pulkovo 1942) in LocalCoordSysDefs.fme file (Bursa transformation as i understood), but shifts there are slightly different from these that i got from another source, i know that datums are being changing with time, but where can i get recent information. I have following problem. I get some data that was made with some datum (is there any need to include one when creating a layer), so after importing it into Mapinfo i have certain coords shift. What can i do? Is there any understandable source of imformation about datums? -- Best regards, Sim D. Biodiversity Conservation Center, Moscow GIS Dept. ++7(095)-124-7934 mailto:[EMAIL PROTECTED] -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED] -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
MI RE: dem of Indian subcontinent
Dear Junior Geologist, DEM data of India is a military secret in India. The only known source of 1:50,000 scale topographic data (not from the Survey of India) are the old USSR's military topo map series of India. It's expensive, but you can get it out of the Netherlands. Be careful though, since you are inside of India's borders, it is a crime against the National Secrecy Act to possess that data in India. You can go to jail if you are caught with the stuff, or if it's discovered on your computer/workstation. This topic is one that has caused (and still causes) a great deal of heartburn within the GIS Community in India. That is an internal concern to the citizens of India, and a problem that can only be addressed through your own internal Parlimentary process of your National Government. In the meantime, be careful what you ask for. You might get it. Clifford J. Mugnier ([EMAIL PROTECTED]) The Topographic Engineering Laboratory Department of Civil and Environmental Engineering UNIVERSITY OF NEW ORLEANS New Orleans, Louisiana 70148 Voice and Facsimilie: (504) 280-7095 On Thursday, 10 February, 2000 11:55 PM, asit saha [SMTP:[EMAIL PROTECTED]] wrote: Dear friends, Can anybody supply me with the DEM of Indian subcontinent? Is there any site on the web where I can find it? I need to plot some seismic data using the DEM as background. PLease help asit = asit saha geologist ( junior) GEODATA DATABASE DIVISION CHQ, GSI, 27, J. N. ROAD CALCUTTA - 700016 __ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
RE: MI Australian GDA94
Adrian, Other than asking for a ".prj" file, I would think that the MapInfo List is not the place to go for advice on your topic of interest. Since the Australian Land Information Group (http://www.AUSLIG.gov.au) is the sole authority on the topic, I'd recommend that you go there for the last word on the GDA94. Chances are, someone at AUSLIG speaks MapInfo, too. Clifford J. Mugnier ([EMAIL PROTECTED]) The Topographic Engineering Laboratory Department of Civil and Environmental Engineering UNIVERSITY OF NEW ORLEANS New Orleans, Louisiana 70148 Voice and Facsimilie: (504) 280-7095 -- On Monday, 31 January, 2000 4:41 PM, Adrian Davey [SMTP:[EMAIL PROTECTED]] wrote: Hi listers Does anyone have an updated mapinfo.prj file (compatible with v4.5) which includes provision for the new Australian geocentric datum GDA94? Or, for practical [i.e. MI] purposes, can it be assumed that GDA94 is so close to WGS84 that if it were any closer it would be exact? __ ___ ADRIAN DAVEY mailto:[EMAIL PROTECTED] Phone: 61 2 6201 2517, Fax: 61 2 6201 5305 Applied Ecology Research Group http://aerg.canberra.edu.au/pub/aerg/home.htm School of Resource, Environmental Heritage Sciences http://science.canberra.edu.au/rehs UNIVERSITY OF CANBERRA, ACT, 2601, AUSTRALIA -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED] -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
RE: MI Maps of Niue
Paula, One of my Ph.D. students did the complete readjustment of the Tomb Point Datum for Niue last semester. It was a series of interlocking classical traverse loops with several co-located geodetic-quality GPS stations. The project is 100% complete, and I have the standard topo map of Niue in which the "atlas grid" is actually the local survey grid with 1Km grid blocks lettered for the tourists. The entire project was adjusted with a rigorous least squares network adjustment with the latest debugged version of "ADJUST" by the U.S. National Geodetic Survey. I can't release the stuff to you yet because I have not had time to send the Government of Niue a copy of the final report. Maybe I can do it this week ... when they approve it then maybe I can ... HOWEVER, Whatever happened to the copies of McCaw's books on Viti Levu, Vanua Levu, and Taveuni, as well as a copy of Mike Poidevin's report that Litea Biukoto (of SOPAC) promised she was going to send to me last September? (That's September 20, 1999). I'll let you see mine after you let me see yours ... Clifford J. Mugnier ([EMAIL PROTECTED]) The Topographic Engineering Laboratory Department of Civil and Environmental Engineering UNIVERSITY OF NEW ORLEANS New Orleans, Louisiana 70148 Voice and Facsimilie: (504) 280-7095 --- On Tuesday, 18 January, 2000 4:24 PM, Paula Dawe [SMTP:[EMAIL PROTECTED]] wrote: Listers, Does anyone out there have any digital maps, air photos, or satellite images of the Pacific Island country of Niue, or know from where they might be obtained? Any information would be helpful, as resources out this way tend to be slim. This is for a water utility GIS. Thanks. Cheers, Paula Dawe Water Resource Engineer-SOPAC -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED] -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
RE: MI what is Bonne projection?
Rajeev, I noticed the other answers you have received on the list so far, and they are correct to a point. Within the apparent context of your question about a projection found in an atlas, you have your answer. However, in 19th century Europe and early to middle 20th century Middle East (and most French colonies), the Bonne Projection means something quite different. When working with Geodetic Grid systems it is an ellipsoidal implementation that is NOT the same as using the spherical equations. Geographers will occasionally use ellipsoidal Authalic latitude in thematic applications with the spherical equations. (See the late Prof. Karl Rinner in "Zeitschritt der Vermessungswessen," back in 1932 - I forgot which issue.) The February, 2000 issue of "Photogrammetric Engineering and Remote Sensing" will feature my column on Grids and Datums for the Republic of Madagascar. In that, I discuss the Bonne projection as used in Madagascar and why General Jean Laborde hated it for geodetic work. You can find other countries in past issues of my column at: http://www.asprs.org/resources.html If MI supports it, I would expect it to be the thematic spherical implementation and NOT the special ellipsoidal power series once used for geodetic National Grid systems. Clifford J. Mugnier ([EMAIL PROTECTED]) The Topographic Engineering Laboratory Department of Civil and Environmental Engineering UNIVERSITY OF NEW ORLEANS New Orleans, Louisiana 70148 Voice and Facsimilie: (504) 280-7095 Clifford J. Mugnier ([EMAIL PROTECTED]) The Topographic Engineering Laboratory Department of Civil and Environmental Engineering UNIVERSITY OF NEW ORLEANS New Orleans, Louisiana 70148 Voice and Facsimilie: (504) 280-7095 - On Sunday, 16 January, 2000 10:29 AM, Dr Rajeev saraf [SMTP:[EMAIL PROTECTED]] wrote: Hi: has any body heard of bonne projection. i came across it in an atlas. does mi support it. if so, which option in projection file would do it. -- rajeev saraf File: ATT00032.html -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
MI Germaine Ellipsoid
Merry Christmas everybody! I'm at home today and don't want to go to the campus. Could someone please look up the date of the Germaine ellipsoid where a = 6,378,284 and 1/f = 294 ??? (It was used in Madagascar in the 1800's.) Thanks, Clifford J. Mugnier ([EMAIL PROTECTED]) The Topographic Engineering Laboratory Department of Civil and Environmental Engineering UNIVERSITY OF NEW ORLEANS New Orleans, Louisiana 70148 Voice and Facsimilie: (504) 280-7095 -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
RE: MI Brazil Projection Details
Scott, This is out of my "scale" of expertise, but by any chance could this sheet be cut on the IMW (International Map of the World) format? If it is, it's not a Lambert but a Lallemond Polyconic - infinite number of standard parallels. The math is in Snyder's USGS Bible. Merry Christmas! Clifford J. Mugnier ([EMAIL PROTECTED]) The Topographic Engineering Laboratory Department of Civil and Environmental Engineering UNIVERSITY OF NEW ORLEANS New Orleans, Louisiana 70148 Voice and Facsimilie: (504) 280-7095 On Thursday, 23 December, 1999 3:11 AM, Scott Davies [SMTP:[EMAIL PROTECTED]] wrote: Listers Can somebody please help. I need to know the projection parameters for the 1:500,000 geological mapsheet series over Brazil. I believe it is the Lambert Conformal Conic Projection, but unsure of the standard parallels to use. Any help would be appreciated Many Thanks and Happy Christmas Scott Davies Meridian GIS PO Box 295 Level 2, 1050 Hay Street West Perth 6872 Western Australia Phone : (618) 9226-0101 Fax : (618) 9226-0102 email [EMAIL PROTECTED] http://www.meridian-gis.com/ -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED] -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
RE: MI Aerial Photography - Printing and Storage
Steven, Who is doing the photogrammetry? Is your photogrammetrist doing "softcopy" aerotriangulation or are they using analytical plotters? Do you intend to use only rectified imagery or are you going for orthophotos? What type of terrain are you working in? Is this urban, rural, dessert, forest, what? What do you need to resolve? Are you having your imagery scanned by a professional mapping company that uses a calibrated photogrammetric scanner? What calibrated focal length are you using from what altitude? What is the AWAR - Area Weighted Average Resolution of the mapping camera? Did it have IMC - Image Motion Compensation? Was it turned on for the flight? What is the level of image smear? Who wrote the specifications for the photography? Is this color, color infrared, or panchromatic? Is this a professional mapping project, or is some secretary/typist going to stick paper prints into an office-grade HP scanjet? Just a detail or two would help ... Clifford J. Mugnier ([EMAIL PROTECTED]) The Topographic Engineering Laboratory Department of Civil and Environmental Engineering UNIVERSITY OF NEW ORLEANS New Orleans, Louisiana 70148 Voice and Facsimilie: (504) 280-7095 On Wednesday, 14 July, 1999 9:15 PM, Steven Heapy [SMTP:[EMAIL PROTECTED]] wrote: Our Council has just had some aerial photography flown at 1:5000 and are investigating at what DPI we should have this scanned at ie 600 or 1200 DPI We are currently testing both, obviously the 1200 requires more storage and cost but gives an improved image on the screen and prints better. However both images that are printed through MapInfo 5.5 in the layout seem to loose a fair amount of quality compared to being printed in say Photo Editor. Also has anyone used and printed images compressed with Mr Sid over a NT network. All comments, sugestions and ideas regarding DPI (resolution), storage and printing would be appreciate Regards Steve -- -- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
