2,961 reputation
317
bio website agl.org.au
location Hobart, Tasmania
age
visits member for 2 years, 10 months
seen Apr 16 at 22:43

I am a GIS Technician at Glenorchy City Council in Tasmania. Currently enjoying learning web mapping stuff, using Leaflet as a mapping library.


Apr
2
comment Why does GPS positioning require four satellites?
Link: colorado.edu/geography/gcraft/notes/gps/gps_f.html
Apr
2
comment Why does GPS positioning require four satellites?
I think this answer is technically incorrect. For GPS to work, your receiver generates the same codes the satellites generate, and it compares the one generated with the one received in order to compute the time difference, and hence distance from the satellite. For this to work you need to know TIME. (An aside, GPS time is very, very precise.) The minimum number of satellites required to work out your position is 4, because you're solving for X, Y, Z and TIME. YOu do get an ambiguous position, either on the Earth's surface or up in space, you can trivially dismiss one of these.
Mar
31
answered How to load big geo-data file into web application
Mar
27
reviewed Approve suggested edit on Create an X,Y latitude and longitude grid from an raster
Mar
19
answered Start-Marker from geojson polyline
Mar
18
answered 3D perspective on maps in Leaflet, CartoDB?
Mar
16
comment Getting WFS data from Geoserver into leaflet
I agree with @TravisWebb. See my alternate answer below.
Mar
16
answered Getting WFS data from Geoserver into leaflet
Mar
11
answered Edit legend Tilemill legend items
Mar
11
comment how to get the boundaries of a city in KML from google maps
And even if you could, you don't have a licence to use it.
Mar
10
comment Problem in multiple dataframe visibility in arcgis 10
What about export to PDF and then convert to PNG?
Mar
10
comment Problem in multiple dataframe visibility in arcgis 10
Careful with styles, too. If you use a transparent style then ArcGIS will rasterise your map. Maybe some of your styles are different and need transparency?
Mar
10
comment qgis 64 bit ODBC set up link to 32 bit Access on win7
@BerndV. I use QGIS 64 bit every day and it works fine.
Mar
10
comment qgis 64 bit ODBC set up link to 32 bit Access on win7
See my answer below. There are two ODBC driver locations in 64 bit Windows. One for 32 bit applications, one for 64 bit applications.
Mar
10
answered qgis 64 bit ODBC set up link to 32 bit Access on win7
Mar
10
comment Formula to Check Latitude & Longitude is within Area without Google Maps Api
Python is widely used, just google the error message: stackoverflow.com/questions/14426491/…
Mar
6
answered Formula to Check Latitude & Longitude is within Area without Google Maps Api
Mar
6
comment How to determine if an object is a circle
I think this is the neatest idea without breaking out into points. If you try to fit a circle, of course, a square will fit perfectly.
Mar
5
reviewed Approve suggested edit on Creating contours for specific elevations
Mar
5
answered Replacing a corporate GIS