Map Digitalization Effort

[Nisha Thompson]

Hi All,

There have been tons of threads on getting more local area maps. So lets try to work together and get it done.

We started a github wiki to collect links to PDFs we have found that need to be digitalized.

https://github.com/datameet/maps/wiki/Maps-we-found-that-need-to-be-digitalized.

How should we do this? Who can help?

I think we do some skill sharing hangouts on how to digitalize if people are interested and slowly work on freeing sets of maps. 

What do you all think?

Nisha

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Nisha Thompson

DataMeet.org

ni...@datameet.org

skype: nishaqt

mobile: 962-061-2245

[Johnson Chetty]

Hey Nish,

These are images in pdfs which were generated from a vector map data backend. 

The map warper http://mapwarper.net/ might help in geo-referencing the image projections. 

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Regards,
Johnson Chetty

[Chinmay Tumbe]

Hi,

Am assuming we have maps for Bangalore, Hyderabad, Mumbai, Delhi. Someone needs to start a googlespreadsheets with India's top 100 cities by population and see the gaps. Plan to have students digitize some ward (municipal/Census) level maps soon and this list would be useful.

Regards,

Chinmay Tumbe

[Justin Meyers]

Chinmay,

here is a csv of top 150 cities:

Source: https://en.wikipedia.org/wiki/List_of_cities_in_India_by_population

rank,City,Population 2011,Population 2001,State

1,Mumbai,"12,478,447","11,978,450",Maharashtra

2,New Delhi,"11,007,835","9,879,172",Delhi

3,Bangalore,"8,425,970","4,301,326",Karnataka

4,Hyderabad[5][6],"7,170,545","3,637,483",Telangana

5,Chennai[7],"6,727,000","4,343,645",Tamil Nadu

6,Ahmedabad,"5,570,585","3,520,085",Gujarat

7,Kolkata,"4,486,679","4,572,876",West Bengal

8,Surat,"4,462,002","2,433,835",Gujarat

9,Pune,"3,115,431","2,538,473",Maharashtra

10,Jaipur,"3,073,350","2,322,575",Rajasthan

11,Lucknow,"2,815,601","2,185,927",Uttar Pradesh

12,Kanpur,"2,767,031","2,551,337",Uttar Pradesh

13,Nagpur,"2,405,421","2,052,066",Maharashtra

14,Indore,"1,960,631","1,474,968",Madhya Pradesh

15,Visakhapatnam[8],"1,897,823","982,904",Andhra Pradesh

16,Thane,"1,818,872","1,262,551",Maharashtra

17,Bhopal,"1,798,218","1,437,354",Madhya Pradesh

18,Pimpri-Chinchwad,"1,729,359","1,012,472",Maharashtra

19,Patna,"1,683,200","1,366,444",Bihar

20,Vadodara,"1,666,703","1,306,227",Gujarat

21,Ghaziabad,"1,636,068","968,256",Uttar Pradesh

22,Ludhiana,"1,613,878","1,398,467",Punjab

23,Coimbatore[9],"1,601,438","930,882",Tamil Nadu

24,Agra,"1,574,542","1,275,134",Uttar Pradesh

25,Madurai[10],"1,561,129","928,869",Tamil Nadu

26,Nashik,"1,486,973","1,077,236",Maharashtra

27,Faridabad,"1,404,653","1,055,938",Haryana

28,Meerut,"1,309,023","1,039,405",Uttar Pradesh

29,Rajkot,"1,286,995","967,476",Gujarat

30,Kalyan-Dombivali,"1,246,381","1,193,512",Maharashtra

31,Vasai-Virar,"1,221,233","693,350",Maharashtra

32,Varanasi,"1,201,815","1,091,918",Uttar Pradesh

33,Srinagar,"1,192,792","898,440",Jammu and Kashmir

34,Aurangabad,"1,171,330","873,311",Maharashtra

35,Dhanbad,"1,161,561","1,065,327",Jharkhand

36,Amritsar,"1,132,761","966,862",Punjab

37,Navi Mumbai,"1,119,477","704,002",Maharashtra

38,Allahabad,"1,117,094","975,393",Uttar Pradesh

39,Ranchi,"1,073,440","847,093",Jharkhand

40,Howrah,"1,072,161","1,007,532",West Bengal

41,Jabalpur,"1,054,336","932,484",Madhya Pradesh

42,Gwalior,"1,053,505","827,026",Madhya Pradesh

43,Vijayawada,"1,034,358","851,282",Andhra Pradesh

44,Jodhpur,"1,033,918","851,051",Rajasthan

45,Raipur,"1,010,087","605,747",Chhattisgarh

46,Kota,"1,001,365","694,316",Rajasthan

47,Guwahati,"963,429","809,895",Assam

48,Chandigarh,"960,787","808,515",Chandigarh

49,Solapur,"951,118","872,478",Maharashtra

51,Hubballi-Dharwad,"943,857","786,195",Karnataka

52,Tiruchirappalli[11],"916,674","752,066",Tamil Nadu

53,Bareilly,"898,167","718,395",Uttar Pradesh

54,Moradabad,"889,810","641,583",Uttar Pradesh

55,Mysore,"887,446","755,379",Karnataka

56,Tiruppur[12],"877,778","344,543",Tamil Nadu

57,Gurgaon,"876,824","173,542",Haryana

58,Aligarh,"872,575","669,087",Uttar Pradesh

59,Jalandhar,"862,196","706,043",Punjab

60,Bhubaneswar,"837,737","648,032",Orissa

61,Salem,"831,038","696,760",Tamil Nadu

62,Mira-Bhayandar,"814,655","520,388",Maharashtra

63,Warangal[13],"811,844","530,636",Telangana

64,Thiruvananthapuram,"752,490","744,983",Kerala

65,Guntur[14],"743,354","514,461",Andhra Pradesh

66,Bhiwandi,"711,329","598,741",Maharashtra

67,Saharanpur,"703,345","455,754",Uttar Pradesh

68,Gorakhpur,"671,048","622,701",Uttar Pradesh

69,Bikaner,"647,804","529,690",Rajasthan

70,Amravati,"646,801","549,510",Maharashtra

71,Noida,"642,381","305,058",Uttar Pradesh

72,Jamshedpur,"629,659","573,096",Jharkhand

73,Bhilai,"625,697","556,366",Chhattisgarh

74,Cuttack,"606,007","534,654",Orissa

75,Firozabad,"603,797","279,102",Uttar Pradesh

76,Kochi,"601,574","596,473",Kerala

77,Nellore[15],"600,869","378,428",Andhra Pradesh

78,Bhavnagar,"593,768","511,085",Gujarat

79,Dehradun,"578,420","426,674",Uttarakhand

80,Durgapur,"566,937","493,405",West Bengal

81,Asansol,"564,491","475,439",West Bengal

82,Nanded,"550,564","430,733",Maharashtra

83,Kolhapur,"549,283","493,167",Maharashtra

84,Ajmer,"542,580","485,575",Rajasthan

85,Gulbarga,"532,031","422,569",Karnataka

86,Jamnagar,"529,308","443,518",Gujarat

87,Ujjain,"515,215","430,427",Madhya Pradesh

88,Loni,"512,296","120,945",Uttar Pradesh

89,Siliguri,"509,709","472,374",West Bengal

90,Jhansi,"507,293","383,644",Uttar Pradesh

91,Ulhasnagar,"506,937","473,731",Maharashtra

92,Jammu,"503,690","369,959",Jammu and Kashmir

93,Sangli-Miraj & Kupwad,"502,697","436,781",Maharashtra

94,Mangalore,"499,486","399,565",Karnataka

95,Erode[16],"498,129","173,600",Tamil Nadu

96,Belgaum,"488,292","399,653",Karnataka

97,Ambattur,"478,134","310,967",Tamil Nadu

98,Tirunelveli,"474,838","411,831",Tamil Nadu

99,Malegaon,"471,006","409,403",Maharashtra

100,Gaya,"463,454","385,432",Bihar

101,Jalgaon,"460,468","368,618",Maharashtra

102,Udaipur,"451,735","389,438",Rajasthan

103,Maheshtala,"449,423","385,266",West Bengal

104,Davanagere,"435,128","364,523",Karnataka

105,Kozhikode,"432,097","436,556",Kerala

106,Akola,"427,146","400,520",Maharashtra

107,Kurnool,"430,214","269,122",Andhra Pradesh

108,Rajpur Sonarpur,"423,806","336,707",West Bengal

109,Rajahmundry[17][18],"419,818","315,251",Andhra Pradesh

110,Bokaro,"413,934","393,805",Jharkhand

111,South Dumdum,"410,524","392,444",West Bengal

112,Bellary,"409,644","316,766",Karnataka

113,Patiala,"405,164","303,151",Punjab

114,Gopalpur,"404,991","271,811",West Bengal

115,Agartala,"399,688","271,811",Tripura

116,Bhagalpur,"398,138","340,767",Bihar

117,Muzaffarnagar,"392,451","316,729",Uttar Pradesh

118,Bhatpara,"390,467","442,385",West Bengal

119,Panihati,"383,522","348,438",West Bengal

120,Latur,"382,754","299,985",Maharashtra

121,Dhule,"376,093","341,755",Maharashtra

122,Rohtak,"373,133","286,807",Haryana

123,Korba,"363,210","315,690",Chhattisgarh

124,Bhilwara,"360,009","280,128",Rajasthan

125,Berhampur,"355,823","307,792",Orissa

126,Muzaffarpur,"351,838","305,525",Bihar

127,Ahmednagar,"350,905","307,615",Maharashtra

128,Mathura,"349,336","302,770",Uttar Pradesh

129,Kollam,"349,033","361,560",Kerala

130,Avadi,"344,701","229,403",Tamil Nadu

131,Kadapa,"343,054","125,725",Andhra Pradesh

132,Kamarhati,"336,579","314,507",West Bengal

133,Bilaspur,"330,106","274,917",Chhattisgarh

134,Shahjahanpur,"327,975","296,662",Uttar Pradesh

135,Satara,"326,789","228,175",Maharashtra

136,Bijapur,"326,360","228,175",Karnataka

137,Rampur,"325,248","281,494",Uttar Pradesh

138,Shivamogga,"322,428","274,352",Karnataka

139,Chandrapur,"321,036","289,450",Maharashtra

140,Junagadh,"320,250","168,686",Gujarat

141,Thrissur,"315,596","317,526",Kerala

142,Alwar,"315,310","260,593",Rajasthan

143,Bardhaman,"314,638","285,602",West Bengal

144,Kulti,"313,977","289,903",West Bengal

145,Kakinada,"312,538","296,329",Andhra Pradesh

146,Nizamabad,"310,467","288,722",Telangana

147,Parbhani,"307,191","259,329",Maharashtra

148,Jalpaiguri,"303,874","245,929",West Bengal

149,Hisar,"301,249","256,689",Haryana

150,Ozhukarai,"300,028","217,707",Puducherry

151,Bihar Sharif,"296,889","232,071",Bihar

152,Panipat,"294,150","261,740",Haryana

153,Darbhanga,"294,116","267,348",Bihar

154,Bally,"291,972","260,906",West Bengal

155,Aizawl,"291,822","228,280",Mizoram

156,Dewas,"289,438","231,672",Madhya Pradesh

157,Ichalkaranji,"287,570","257,610",Maharashtra

158,Tirupati,"287,482","228,202",Andhra Pradesh

159,Karnal,"286,974","210,476",Haryana

160,Bathinda,"285,813","217,256",Punjab

161,Jalna,"285,349","235,795",Maharashtra

162,Barasat,"283,443","231,515",West Bengal

163,Kirari Suleman Nagar,"282,598","153,874",Delhi

164,Purnia,"280,547","171,687",Bihar

165,Satna,"280,248","225,464",Madhya Pradesh

166,Mau,"279,060","212,657",Uttar Pradesh

167,Sonipat,"277,053","214,974",Haryana

168,Farrukhabad,"275,750","228,333",Uttar Pradesh

169,Sagar,"273,357","232,133",Madhya Pradesh

170,Rourkela,"273,217","224,601",Orissa

171,Durg,"268,679","232,517",Chhattisgarh

172,Imphal,"264,986","221,492",Manipur

173,Ratlam,"264,810","222,202",Madhya Pradesh

174,Hapur,"262,801","211,983",Uttar Pradesh

175,Anantapur,"261,004","218,808",Andhra Pradesh

176,Arrah,"261,099","203,380",Bihar

177,Karimnagar,"260,899","205,653",Telangana

178,Ramagundam[19],"229,632","236,600",Telangana

179,Etawah,"256,790","210,453",Uttar Pradesh

180,Ambernath,"254,003","203,795",Maharashtra

181,North Dumdum,"253,625","220,042",West Bengal

182,Bharatpur,"252,109","204,587",Rajasthan

183,Begusarai,"251,136","93,378",Bihar

184,New Delhi,"249,998","302,147",Delhi

185,Gandhidham,"248,705","166,388",Gujarat

186,Baranagar,"248,466","250,768",West Bengal

187,Tiruvottiyur,"248,059","212,281",Tamil Nadu

188,Puducherry,"241,773","220,749",Puducherry

189,Sikar,"237,579","184,904",Rajasthan

190,Thoothukudi,"237,374","216,058",Tamil Nadu

191,Rewa,"235,422","183,274",Madhya Pradesh

192,Mirzapur,"233,691","205,053",Uttar Pradesh

193,Raichur,"232,456","207,421",Karnataka

194,Pali,"229,956","187,641",Rajasthan

195,Vijayanagaram,"228,025","174,324",Andhra Pradesh

196,Katihar,"225,982","175,169",Bihar

197,Haridwar,"225,235","175,010",Uttarakhand

198,Sri Ganganagar,"224,773","210,713",Rajasthan

199,Karawal Nagar,"224,666","148,549",Delhi

200,Nagercoil,"224,329","208,149",Tamil Nadu

 

[Sharad Lele]

Dear Nisha,

Can you take the csv given by Justin, and create an online spreadsheet, with columns indicating URL for source pdf /jpeg, whether digitized or not, if not then who is taking the lead on that city, and URL of final shapefile.... something like that...?

I can contribute shapefile for Coimbatore city ward boundaries also, if I know where to send it/upload it.

Ideally, we would want pdfs and shapefiles all sitting in parallel folders in the same location?

Sharad

[Nisha Thompson]

Here you go:

https://docs.google.com/spreadsheets/d/1UUqc-QZxhYkxmP4v78-adyHjDN6R8vQsCBwynXX30pU/edit?usp=sharing

Folder for upload

https://drive.google.com/folderview?id=0B0YyF4NZwNUHODNaZHZiT1NFbjQ&usp=sharing

Can we also track if the RTI has been filed as well and who

Nisha

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[Namrata Mehta]

the skill sharing hangouts on how to digitalize would be great. i'd like to contribute, especially with gurgaon / delhi. 

www.namratamehta.com
www.everydayplaceseverydaytraces.com
 

[Arun Ganesh]

The digitization will involve using a combination of tools. If anyone can share a use case on how they want to use the data, it will help create simple instructional guides to document the process. The OpenStreetMap India community can help with making guides and teaching if needed.

Arun Ganesh

(planemad)

[Dilip Damle]

Hi, 

What are the copyright / legal issues in reverse engineering these maps and sharing them back publicly.

I have checked the maps On the link Bihar and Gujarat seen to be good because they are vector and have layers which can be reverse engineered as separatr layers. Rajiv Gandhi awas yojna maps are raste rand are practically useless.

On Friday, December 18, 2015 at 12:16:12 PM UTC+5:30, Nisha Thompson wrote:

["Sharad Lele [शरच्चंद्र लेले]"]

I am hoping to lay my hands on old (1991) village boundary layer maps for many states.

We should probably focus our energies on Town Ward boundary maps--these are the hardest to get.

Copyright: I would not worry about this---this has to be public information...

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[Dilip Damle]

HI, 

I have been able to put together Gujarat boundaries from the PDF files in the links above.
Right now it is an Autocad Drawing with Village, Taluk, and District boundaries. 

I will try to georeference it and share as .dwg  somewhere.

It is about 55 MB file.

Shape file may be a long way away since there is no point in it without at least village name attributes.

Links names may take take some time. Some one else also can try it may be faster than me.

enclosed two snapshots. DWG file tomorrow/day after.

I will create a new discussion thread for sharing/discussing the dwg file.

On Friday, December 18, 2015 at 12:16:12 PM UTC+5:30, Nisha Thompson wrote:

["Sharad Lele [शरच्चंद्र लेले]"]

Dilip:

before you put in more effort, could you pause for 24hrs? I think I may have the Gujarat village boundary file for 1991 in vector (un-georeferenced) format. Will know by tomorrow.

Sharad

--

[Justin Meyers]

A Dadra and Nagar Haveli map I traced a while back, digitized and overlayed on 9,000,000 small polygons to make seamless.  If I find the map source I will attach.  here is the shapefile.

Cheers,

Justin 

[Dilip Damle]

Hi,

I think I will share the data anyway after doing some checks. I am not attempting the attribute linking right now because that will be a bigger effort.

I tried to georeference it. 

My approach was as follows. 

So far I have not used any transformations which distorts the shape as it was in the PDF file.

I imported each district separately and have been able to match them with each other to make the whole of Gujarat using only MOVE, SCALE (EQUAL XY) and ROTATE. 

Practically I used the Autocad ALIGN command. 

Which means I have exactly same shape as in PDF files. 

Then I thought I will guess the original projection and see if it matches and then reproject it rather than Doing any rubbersheeting/other arbritrary distortions to shape.

I tried LCC projection for India , UTM 43N, and LL84 in that order. They do not seem to match. 

Anyone may suggest any other possible projection. 

Otherwise I will check it and share it as it is.

This is the summary of the Data : 

33 districts : 114 Polylines in Autocad (because of Islands and enclaves)

379 Taluka Polylines

20128 Village polylines

15804 Text names

16137 Markers manly the Village dot.

[shravan]

Hi all,

I am including Mr. Joshi from Gujarat Police and who is also the head of the GIS department, Gujarat Police. He might be having some other ideas and resources.

Dear Joshi Sir,

Please help the Datameet community. They are helping us to improve the openstreetmap data for Gujarat. Your inputs will be valuable.

Thank You,

Shravan

CEPT University

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[Justin Meyers]

Source:http://dnh.nic.in/tenders/D_PDA_PLU_DNH.pdf

For some reason they pulled the map...  Can no longer access from their agency.

["Sharad Lele [शरच्चंद्र लेले]"]

Dear Dilip:

the projection depends upon the source. In most cases, the only source that exists is the Census district handbook maps. These in turn have been prepared from taluka level maps that the Directorate of Land Records and Survey Settlement creates from village-level cadastral maps. Now this method by definition means there is no original projection system, and that these maps are not geo-corrected (not terrain-corrected) as the originals are based on chain survey and plain table surveys, not theodolite surveys. So unless someone has done some correction work before creating the maps you used, they would have significant limitations in terms of geo-referencing. Our experience (we created the Karnataka layer from scratch, by digitizing the individual taluka-level village boundary maps by hand) tells us RMS errors of 2-3km for the state as a whole would be normal. What we did was to georeference by matching the state boundary so created to the Survey of India state boundary, which is available and is a properly projected layer. (Simply creating a prj file for the existing map does not work, because the scans will be anyway in centimetre or mm or inch units. So you need pucca geo-rectification.) Fairly easily done in QGIS.

I hope this helps. Am still digging for the layers we supposedly have.

Sharad

[Rohith John]

Can someone help me in getting the ward shape file of Indore .

On Friday, December 18, 2015 at 12:16:12 PM UTC+5:30, Nisha Thompson wrote:

[TEJ CHAVDA]

can u give me a geo-reference map Boundary Or map or something  I'll digitize ward boundary for u ...

Tej Chavda (PG191052)

Pursuing M.Tech In Geomatics (2nd Semester),

Centre for Environmental Planning and Technology (CEPT University), 

KL Campus, University Road, Navrangpura, Ahmedabad - 380009

Contact Number : 8866440170

Email id: tejp400@gmail.com

               tej.pg191052@cept.ac.in

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[Sharad Lele]

Requesting Rohith to move this conversation to a new thread with its own accurate subject header, not keep it under "Map digitization effort"

On Wednesday, July 8, 2020 at 8:10:03 PM UTC+5:30, TEJ CHAVDA wrote:

can u give me a geo-reference map Boundary Or map or something  I'll digitize ward boundary for u ...

Tej Chavda (PG191052)

Pursuing M.Tech In Geomatics (2nd Semester),

Centre for Environmental Planning and Technology (CEPT University), 

KL Campus, University Road, Navrangpura, Ahmedabad - 380009

Contact Number : 8866440170

Email id: tejp400...@gmail.com

               tej.pg191052...@cept.ac.in

On Tue, Jul 7, 2020 at 8:19 PM Rohith John <rohit...@gmail.com> wrote:

Can someone help me in getting the ward shape file of Indore .

On Friday, December 18, 2015 at 12:16:12 PM UTC+5:30, Nisha Thompson wrote:

Hi All,

There have been tons of threads on getting more local area maps. So lets try to work together and get it done.

We started a github wiki to collect links to PDFs we have found that need to be digitalized.

https://github.com/datameet/maps/wiki/Maps-we-found-that-need-to-be-digitalized.

How should we do this? Who can help?

I think we do some skill sharing hangouts on how to digitalize if people are interested and slowly work on freeing sets of maps. 

What do you all think?

Nisha

--

Nisha Thompson

DataMeet.org

ni...@datameet.org

skype: nishaqt

mobile: 962-061-2245

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[Rohith John]

Please see ur Inbox

To view this discussion on the web visit https://groups.google.com/d/msgid/datameet/CAOt9pNca2grQ%3D05ouU2mSWekGbbdwbnJ5c6UZao4sxVddztLSw%40mail.gmail.com.

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Rohith John

M.Tech Remote Sensing & GIS

NITK, Surathkal

Mangalore- 575025

[Rohith John]

Is there any source for Indore Ward maps

On Tue, Jul 7, 2020 at 8:19 PM Rohith John <rohith...@gmail.com> wrote:

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