The Processing of the 1920's Survey Sheets of the City of Saint John, NB for Online Map
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Back in the 1920s, Mr. Murdoch and his crew surveyed the entire city of Saint John with great precision. The original sheets were scanned, which were black and white, and were made available on the Saint John open source website. Unfortunately these were not registered and individual sheets. These survey sheets would be very useful for City employees and interesting for the public. After georeferencing each sheet to its correct location and scale, they were reference to the city property lines, with the help of ortho photos and city streets. Then each sheet was cropped to remove the border and surrounding text, using the Image Analysis window clip tool, and added to a mosaic dataset. The areas of overlap were clipped in the same way so that the areas of more detail was visible. This dataset was the input for the Copy Raster tool, which created one tiff file for all the sheets in 1 bit. The final mosaic was cleaned with the Raster Painting Tool to remove any redundant street names. This cleaned mosaic would then be uploaded to the online interactive City of Saint John Map as a layer for the public to see. In conjunction with City of Saint John.
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The Processing of the 1920's Survey Sheets of the City of Saint John, NB for Online Map
- 1. Processing of 1920’s Saint John Survey Sheets for Online Map BY SAM ZALUSKI MAY 24, 2016
- 2. Overview Background on Survey Project Survey Sheets Index Georeference Crop Default Symbol Mosaic Mosaic Clean up Raster Painter
- 3. • May 18 1920 Common Council • Under the direction of City Engineer • Mr. Murdoch, Deputy Land Surveyor, was hired to make detailed surveys and prepare plans for the City of Saint John • Original Estimate - $25,000 ($283,800 in 2016) • Original Completion Date – Jan.1, 1923 • Dec 13 1922 Common Council Resolution • Project review • Original Budget was not accepted • Not to exceed $3000 ($41,800 in 2016) for the full completion • Dec 15 1922 • Mr. Murdoch accepted Survey Project
- 4. • Oct 25 1925 • City Engineer wrote to the mayor • Justified the over budget and original estimate • Field work was finished • Used 320 note books and research going back 55 years. • Compared the cost of $600,000 and time of 10 years for the Island of Montreal • Suggested budget of more than $37,000 ($521,700 in 2016) Survey Project
- 5. • Jul 4 1927 • City Engineer wrote to the mayor • Mr. Murdock didn’t not complete the work by 1925 • Due to lack of explanation, he was not paid to finish the project. • Finally cost 40,485 dollars – ($570,800 in 2016) Survey Project
- 6. • Total of 106 Sheets • 33 sheets had no Date • Earliest Date : Dec13,1922 • Latest Date : Jan1,1926 • Duration: 3 years & 20 days • Index Date: Jan1,1963
- 8. Georeference 1. Fit to Display Roughly lined up one corner and proportionally the right scale
- 9. Georeference 2. Draw Links Primary Source for reference was the Streets and the Property Line 3. Rectify No compression
- 11. Crop 1. Change default Symbol Properties from the Drawing Drop down menu 2. Draw polygon around the Sheet Removing the Title, scale and legend Removed border and less detailed overlap
- 12. Crop 1. Used the Clip tool on the Image Analysis Window With the polygon selected
- 13. Crop
- 14. Crop
- 15. Mosaic 1. Create A Mosaic Dataset in a GeoDatabase Setting the Coordinate System
- 16. Mosaic 2. Add Rasters Workspace Using the folder with all the clipped rasters Allow Duplicates Made sure there was only one copy of each sheet
- 17. Mosaic 3. Copy Raster NoData Value left blank Converts to 1 bit Output file size of 11.3 GB
- 18. Mosaic Copy Raster Options for Pixel Types
- 22. Mosaic Clean up 1. Copied a version outside of Geodatabase 1. Setting the Processing Extant to the display 2. Create Polyline Shapefile
- 23. Mosaic Clean up 4. Symbolize Raster with Unique Values 5. Edit Tool Bar Start Editing 6. ArcScan Tool Bar Start Raster Clean up 7. Raster Painter Tool Bar Draw Polygons around duplicate Street Names
- 24. Mosaic Clean up
- 25. Web Mapping App http://maps.saintjohn.ca/en/ Survey Sheets (1920s) To be Added
- 26. Data Sources Background Information and Data provided by the City of Saint John. Acknowledgments Yves Leger & John Ellefsen, City of Saint John COGS Instructors Dave MacLean & Rob Hodder & Mark Herbert
Editor's Notes
- On May 18 1920, The common council agreed that under the direction of City Engineer, Mr Murdoch would not exceed a cost of 25 thousand and be finished by Jan 1 1923. On Dec 13 1922, there was a review of the project and a resolution was …Inasmush as $25000 for making surveys and preparing plans for the City of Saint John was found insufficient for the completion of the work and not to exceed 3000 for the full completion On Dec 15 1922, Mr. Murdoch accepted the Resolution of City Survey from the day before. Five years later on Oct 25 1925, the city engeneer wrote to the mayer justifying the over budget and Original Estimate- more than $37,000
- On May 18 1920, The common council agreed that under the direction of City Engineer, Mr Murdoch would not exceed a cost of 25 thousand and be finished by Jan 1 1923. On Dec 13 1922, there was a review of the project and a resolution was …Inasmush as $25000 for making surveys and preparing plans for the City of Saint John was found insufficient for the completion of the work and not to exceed 3000 for the full completion On Dec 15 1922, Mr. Murdoch accepted the Resolution of City Survey from the day before. Five years later on Oct 25 1925, the city engeneer wrote to the mayer justifying the over budget and Original Estimate- more than $37,000
- On May 18 1920, The common council agreed that under the direction of City Engineer, Mr Murdoch would not exceed a cost of 25 thousand and be finished by Jan 1 1923. On Dec 13 1922, there was a review of the project and a resolution was …Inasmush as $25000 for making surveys and preparing plans for the City of Saint John was found insufficient for the completion of the work and not to exceed 3000 for the full completion On Dec 15 1922, Mr. Murdoch accepted the Resolution of City Survey from the day before. Five years later on Oct 25 1925, the city engeneer wrote to the mayer justifying the over budget and Original Estimate- more than $37,000
- Most had 4 to 6 links The r in name for registered
- Uncropped vs cropped
- Crop outlines for all sheets