The tag has no wiki summary.

learn more… | top users | synonyms

1
vote
1answer
26 views

Import KML to PostGIS

I am looking for a way to import my data from KML (example below) to PostGIS database. <?xml version="1.0" encoding="UTF-8"?> <kml xmlns="http://www.opengis.net/kml/2.2" ...
1
vote
0answers
28 views

What was the first ever developed Indoor Positioning System?

I have searched many articles but could not figure out when was IPS developed and by who. I suppose that it was after the development of GPS, but that might be a wrong assumption as well. Could you ...
0
votes
1answer
74 views

How to upload a series of OS map sheets using QGIS and merge together?

I need to upload historic OS sheets in tiff format, and 'stitch' them together, as some districts are spread over a number of sheets. I have no idea how to do this. Can anyone help?
3
votes
1answer
77 views

How to combine historic OS sheets in order to create density maps of historic streets

I really need some advice on creating historical street maps using GIS software (I have access to QGIS and Diva). Basically, I want to upload a number of historic OS sheets, which I have downloaded ...
4
votes
1answer
121 views

Sourcing GIS data from First World War (WW1)?

Simple question, but does anyone know where I can get some detailed (eg 1:10m scale) vector data from the First World War? I've been through the archives here, but it seems the best sites for it ...
8
votes
2answers
105 views

What purpose do intersection points serve when mapping?

In this old map of California you will notice a ring of intersection points, all circling the focal land mass of the map. What are these intersections used for? I assume they are meant to guide the ...
2
votes
1answer
74 views

Origin of the OSGB36 datum origin

Interpreting 'GIS' in the geographical information science sense, I have a historical question about the 1936 OSGB datum following the 1936-62 retriangulation of Great Britain - hopefully not too ...
0
votes
0answers
26 views

Examples of Sanborn map WMS?

I'm wondering if anyone has heard of or come across any examples of scanned and georeferenced Sanborn Fire Insurance maps being served as a WMS. I know there are copyright issues, so presumably only ...
2
votes
1answer
66 views

Tiling ArcGIS Desktop Historic Maps

I'm using ArcGIS 10.2 Desktop on a Windows platform. I have georeferenced about a dozen USGS topographic raster maps from around 1900. Each georeferenced map is an now an .mxd file. To the best ...
2
votes
1answer
431 views

How to retrieve historical imagery from web mapping services?

Is there a way to retrieve historical imagery from Google/Bing/Yandex mapping services through their APIs? For example, I'd like to show on my website imagery from 2005.
0
votes
0answers
29 views

Can PGrouting be used to identify which path fits a known distance between a start and end node?

I am involved in a research project that uses historic transport data for England and Wales mostly in the nineteenth century. One particular problem concerns coaching data where all that is known is ...
5
votes
1answer
121 views

Is there a source for historical shapefiles of Europe in the modern era?

Is there a source for historical shapefiles of Europe in the modern era, i.e. starting ca. 1400? I know that "where can I find historic border data" questions were asked multiple times but I couldn't ...
0
votes
1answer
175 views

How to create vector-based maps showing historic borders [closed]

I'm an absolute beginner in map making. I want to create digital maps with European historic borders that all have the same projection and style. All the data should be vectorized. My idea is to ...
2
votes
2answers
618 views

Spherical Mercator projection invented by Google and not conformal?

I had some certitudes on the Google Spherical Mercator also known under EPSG code 900913 and 3857 before looking at this presentation, I was sure that this projection was in the Mercator family (so ...
5
votes
1answer
118 views

Is there a free dataset of historical geocoordinates of ancient cities and places?

Is there a freely available dataset (csv, geojson, topojson, etc.) with geocoordinates of ancient cities, for example of the Roman Empire? Ideally with additional information like population size? ...
16
votes
1answer
336 views

What do these curly graphics represent on this map?

What do the two curly graphics to the left and right of this map represent? They are the only two on the map and seem to be attached to the border of an area. I'm sorry I haven't posted the full ...
7
votes
2answers
716 views

Easiest way to create historical street maps using QGIS

I want to make some historical street maps using QGIS. I understand how to upload a historical OS map from DigiMaps to QGIS, but I want to actually 'draw' the streets myself in order to have some ...
1
vote
0answers
38 views

Are there any js libraries for reading OSH data?

I want to do time based mapping on openstreetmap data in the Kathmandu, Nepal area. I think i have two options Using OpenStreetMap Change files (OSC) Using OpenStreetmap History files (OSH) I have ...
1
vote
0answers
25 views

Translating lat/lon coordinate on rotated/scaled maps

I need to indicate a lat/lon coordinate in an old map like this: http://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~3017~90020003:Topographical-Map-Of-The-City-and-C Projected on Google Maps: ...
14
votes
3answers
323 views

When did the word “geospatial” first come into usage?

For historical reasons, I'm trying to figure out when the term "geospatial" came into use? The earliest usages I can find are from around 1994, but I would be really surprised if it wasn't used ...
6
votes
1answer
119 views

Is there a name for map projections that produce two disks?

I've seen lots of world maps in the shape of two disks that touch, each one a separate projection of one hemisphere onto a disk -- usually the Western Hemisphere and the Eastern Hemisphere -- so ...
2
votes
0answers
229 views

Linear Referencing Methods: Station Equation origins

DEAR PEOPLE FROM THE FUTURE: Here's what we've figured out so far… I am working in the pipelines field, and I get in touch with the concept of the linear referencing methods, specifically with ...
11
votes
1answer
1k views

Is There A Term For The Old Maps That Had Lines Connecting Pin-Wheels?

Many old maps have lines like below. Is there a term for a map with that type of lines? (from http://r-russell0912-dc2.blogspot.com/2011/01/pirate-maps-and-old-maps.html) My best hypothesis is that ...
1
vote
1answer
269 views

Looking for QGIS Presentation info

I'm preparing a presentation of QGIS to release of the brazilian QGIS user guide. Thus, I would like insert some information about QGIS in global scale. Something like Tim's qgis-for-humanity ...
0
votes
0answers
41 views

Historic country borders in GIS format? [duplicate]

Possible Duplicate: Is there a source for historical shapefiles and tiles? Does anyone know of a good source for historic country borders, in a GIS file format, like shapefiles? I've been ...
4
votes
2answers
178 views

What to do with old GIS books/manuals/etc?

We're having an office clear-out and have come across a number of old GIS paper materials. Random examples (to give a taste - there are about 20-30 in all) include: Postcodes: The New Geography ...
8
votes
1answer
256 views

How to plot approximate geospatial data on a historical map?

Our library is undertaking a project to map historical data regarding 18th and 19th century British and American printers and publishers. One of the problems that we have encountered is the different ...
13
votes
3answers
1k views

80% of data has a spatial component, says who?

This quote about how 80% of all data has a spatial component has been bandied around everywhere. Introduction to GIS classes, product descriptions, talks, etc. Would anybody know who first said it? Or ...
6
votes
1answer
439 views

How to store historical versions of road (route) portions?

Part of my job is to analyze certain portions of road for our clients. A client will ask, I want to look at Road A from parcel XYZ to parcel RST and Road B from parcel RST to parcel OPQ. The way I do ...