Unanswered Questions
9
votes
0answers
277 views
Geotransformation for polar stereographic?
I'm currently working to import CANGRID climate data (provided as Surfer Grid ascii, ".grd" files) into ArcGIS. The grid is 95 rows by 125 columns in size.Metadata provides lat/lon of origin (lower ...
9
votes
3answers
6k views
Best source for high-resolution satellite images free/low-cost?
I am doing a household survey in Kenya, and I need to ensure that my survey team visits every house within a given area. I've been going to google maps and right-clicking on roofs to get coordinates ...
9
votes
0answers
784 views
How to define Winkel Tripel in proj 4.8.0?
I have QGIS with proj 4.8.0 installed. I'd like to add Winkel Tripel projection which seems to be defined as
+proj=wintri
But that definition string does not work. Is this a bug in my proj version, ...
8
votes
1answer
262 views
How to add an attribution on a GeoJSON Layer from Leaflet?
I need to use a GeoJSON Layer on my Leaflet map. Here is a sample of my code:
function onEachFeature(feature, layer) {
if (feature.properties && feature.properties.popupContent) {
...
8
votes
1answer
144 views
What PostGIS [topology] provided tools may be used for data quality assurance?
I'm learning about techniques to ensure GIS data quality. Googling
around, I've found a few papers about theory and best practices (here and here), and a couple of short presentations about the topic ...
8
votes
1answer
145 views
Reprojecting elevation dataset for “tilted Earth”
I would like to create maps of a "tilted Earth", such as the following example where Australia is at the North Pole:
http://i1048.photobucket.com/albums/s379/laskaris_mods/tilted_earth.jpg
I can ...
8
votes
0answers
192 views
ArcObjects running in Addin slower?
I have created a class library which does some geoprocessing. The addin calls a class that is an async process. I have ensured the thread is STA and the arcobjects are thread safe (ie. not passed from ...
8
votes
1answer
779 views
Is it possible to geocode street intersections using Nominatim?
Is it possible to geocode the location of a street intersection using Nominatim?
Example geocode query
Commonwealth Ave at Washington Street, Boston, MA
Successful Geocode by Google
...
7
votes
1answer
247 views
Is there a simple way to sort layers alphabetically in QGIS?
I am working on a big GIS project and not being able to sort the items in the Layers panel is giving me hard time. I can have up to 250 layers in the Layers panel.
I have a special naming scheme for ...
7
votes
1answer
848 views
Splitting polylines according to coincident (or touching) points with other polylines?
The question is unfortunately not answered yet.
I'm looking for a method or python script to split polylines according to coincident points with other polylines, but avoid splitting the ones which ...
7
votes
0answers
1k views
Calculating compass bearing between two GPS coordinates… with a twist
I'm building a virtual tour application that uses Google's streetview code to render the panoramas into a non-distorted view. Each panorama has 1 to n links where the user can select to move on.
I ...
7
votes
1answer
578 views
Geoserver with SQL server consuming all my CPU
This question is long please bear me and my problem.
SQL Server Query profiler
The Sample Query from profiler that geoserver is running that corresponds to SLD I am using and not the SQL SERVER view I ...
6
votes
0answers
69 views
Is it possible to generate a boustrophedon pattern which fill a vector Region with GRASS?
Every thing is in the title...
I have a vector region in GRASS. And I would like to generate a vector (a polyline) beeing the bostrophedon pattern which fill this region.
In the picture bellow, I ...
6
votes
0answers
215 views
Group polygon features to match a set of specifications
I have two different sets of polygon features (398 census tracts and 80 ZIP codes) that each roll up to a larger feature (a US county). Though census tracts are smaller than ZIP codes, they do not ...
6
votes
1answer
125 views
What controls the direction of TopoGeometry Linestrings?
In PostGIS, what if anything controls the direction that topogeometry LINESTRINGs will have when converted to geometry?
It doesn't appear to be the order in which the edges are listed in the call to ...
