Most Popular
1500 questions
34
votes
0 answers
Leaflet v1 plugin: layer control for ungrouped, grouped, and nested-grouped layers
I need a Leaflet plugin which extends L.Control.Layers. I have the following requirements:
works with Leaflet 1.x
handles ungrouped layers alongside grouped ones
handles nested layer groups
does not rely on actual Leaflet LayerGroups, but can be…
Tom Chadwin
- 5,842
- 4
- 25
- 48
34
votes
1 answer
Raster legend in R: how to colour specific values?
I have an elevation model plotted in R
r <- raster("example.dem")
plot(r, col = topo.colors(20))
Some of the values are below sea level (0), and I'd like to have those display in red. How can I assign specific ranges to specific colours in the…
Simbamangu
- 14,773
- 6
- 59
- 93
34
votes
11 answers
Avoiding Google Maps geocode limit?
I'm creating a custom google map that has 125 markers plotted via a cms. When loading the map I get this message:
Geocode was not successful for the following reason: OVER_QUERY_LIMIT
I'm pretty sure it's the way in which I've geocoded the…
Rob
- 794
- 4
- 12
- 26
34
votes
6 answers
Splitting raster into smaller chunks using GDAL?
I have a raster (USGS DEM actually) and I need to split it up into smaller chunks like the image below shows. That was accomplished in ArcGIS 10.0 using the Split Raster tool. I would like a FOSS method to do this. I've looked at GDAL, thinking…
Chad Cooper
- 12,714
- 4
- 46
- 87
34
votes
3 answers
How to produce high-resolution DEMs from new Sentinel-1 data?
This is a general question relating to the new Sentinel-1 data. I'm interested in the potential for using this data to create high resolution DEMs in GIS (I use QGIS), to investigate archaeological sites and landscapes and model their change.
The…
Richard
- 779
- 2
- 8
- 17
34
votes
2 answers
Styling road maps with QGIS?
I am trying to design a beautiful map using QGIS.
There is a similar question here Seeking QGIS tutorials and web resources? but I would like to focus on "designing a map using QGIS".
I was looking for some tools, style database or tutorials to…
Mykolas Simutis
- 776
- 1
- 6
- 15
34
votes
4 answers
Disable panning/dragging on leaflet map for div within map
Does anyone know how to suppress panning when you click and drag over top of a div box embedded within the map itself?
For example here, when you click and drag over top of the legend, the map drags with you. I want to suppress that function.
I am…
Mr. Concolato
- 506
- 1
- 5
- 10
33
votes
6 answers
What's next if our KML is too big/complex for the Google Maps API?
Our web app includes simple mapping capabilities (currently just markers and KML overlays on an embedded Google Map). This works pretty well; the only real limitation we face is KML overlays that go beyond Google's size & complexity restrictions for…
Herb Caudill
- 870
- 3
- 9
- 15
33
votes
3 answers
How to hide "internal" polygon boundaries?
Our task is to draw a lake with a solid outer perimeter line and no lines between internal wetlands, shoals and shallows? 'Tis a relatively straightforward process with Arcinfo coverages and Regions, but alas, that is no longer a viable option for…
matt wilkie
- 28,176
- 35
- 147
- 280
33
votes
5 answers
Does ArcGIS for Desktop support SpatiaLite?
SpatiaLite is playing an increasing role in my organization.
As it stood in 2012, using SpatiaLite alongside ArcGIS Desktop required an amount of importing and exporting of data that was not always trivial.
Outside of products such as the Data…
Roger D.
- 792
- 6
- 8
33
votes
3 answers
Why is ArcGIS called that?
I know there was ArcInfo Workstation, and its earlier name of ARC/INFO which was used prior to the release of ArcGIS 8.0, but how did "Arc" come into the name?
I suspect because of the arc which is a geometric element representing a vector feature.…
Alex Tereshenkov
- 29,912
- 4
- 54
- 119
33
votes
2 answers
How is ST_PointOnSurface calculated?
The PostGIS documentation states that ST_PointOnSurface returns "a POINT guaranteed to lie on the surface". It seems like this function could be trivially implemented to give results that satisfy the documentation but provide little real-world…
mjobrien
- 433
- 4
- 5
33
votes
12 answers
Converting shapefiles to text (ASCII) files?
How can I convert a shapefile (GIS) to text, or, how can I extract the information in a shapefile?
juanpablo
- 431
- 1
- 4
- 4
33
votes
7 answers
Work flow for georeferencing imagery using open source tools?
Does anyone have a recommendation for a work flow for georeferencing high resolution aerial photography using open source tools? Comparison of user friendliness and robustness between Quantum GIS versus GDAL?
spesh
- 493
- 4
- 6
33
votes
1 answer
Implementing version control system for geospatial data?
Not that I am in any immediate need of a right answer here, but I've lately seen some efforts to introduce the concept of "(distributed) version control systems" for geographic data. Some examples (that I know of) are the three whitepapers from…
atlefren
- 4,307
- 20
- 35