24
votes
Choosing OpenLayers or Leaflet?
Though I used Leaflet in my webGIS application, OpenLayers has much more advantages over Leaflet. For example if you want to use your application in mobile devices, OpenLayers is a must for the time ...
- 373
14
votes
Choosing OpenLayers or Leaflet?
There is a great comparison on the two frameworks in this presentation:
And another article also has a great summary:
Customers often ask us, “Which is the best client-side JavaScript mapping ...
- 245
13
votes
Where should I add the API key in ORS Tools?
Check the 'Provider Settings' where an API Key can be given
Environment: QGIS 3.18 on Windows 10
- 28k
13
votes
Accepted
10
votes
Accepted
Downloading sentinel products using API?
I received help from an application developer at JNCC. I will post their answer here to help others.
My problem was that I needed to escape the $ character before value. so the wget command should ...
- 396
10
votes
Best-practices for databases and APIs with geographic data spanning the antimeridian
Speaking purely from a data storage and analysis perspective, the geography type for PostGIS was designed with the antimeridian in mind (among several design goals). There are several functions ...
- 41.1k
10
votes
Is it possible to get OSM data in geojson via overpass api using ipython?
Overpass API doesn't support GeoJSON. You have to perform the conversion from JSON to GeoJSON yourself.
For converting JSON into GeoJSON see this answer. It even contains a solution in Python. ...
- 5,904
9
votes
Accepted
How to download all OSM data within a boundingbox with Overpass?
See the Overpass API Language Guide. Basically you seem to want all data in a bounding box. Depending on your use-case you might want to download nodes, ways and relations.
overpass turbo already has ...
- 5,904
8
votes
Implementing Add Feature action using PyQGIS
I spent a while trying to figure this out too.
The button is found in the QgisInterface class.
# Find the layer to edit
layer = qgis.utils.iface.activeLayer()
layer.startEditing()
# Implement the ...
- 183
8
votes
Accepted
GDAL C++ API: How to create PNG or JPEG from scratch
As user30184 said, in Python, the process would be creating a memory raster of the same dimensions (layers and layer extension), and executing the CreateCopy after that:
driver = gdal....
- 321
8
votes
Representing Time in GeoJSON?
The current GeoJSON specification is geojson.org/geojson-spec.html and it defines "positions" as
A position is represented by an array of numbers. There must be at
least two elements, and ...
- 58.9k
8
votes
Accepted
How to obtain openstreet API key for nominatim (r)?
In the comments of the source code you linked there is an explanation:
@param key To access the openstreetmap API you need a valid API key. You can get it for free at https://developer.mapquest.com
...
- 2,049
8
votes
Accepted
Getting elevation at particular coordinate (lat/lon) programmatically (but offline)?
You can use the rasterio library:
import rasterio
coords = ((147.363,-36.419), (147.361,-36.430))
elevation = 'srtm_66_20.tif'
with rasterio.open(elevation) as src:
vals = src.sample(coords)
...
- 58.5k
7
votes
Downloading sentinel products using API?
A good alternative to the official Scihub is the mirrored Sentinel-2 data on Amazon Web Services.
Sentinel-2 on AWS
This has the advantage of better uptime and the products are already saved in ...
- 9,675
7
votes
Add an API key to QGIS for QOSM layer
I guess you are using the QOSM plugin to display the OpenCycleMap, since the standard OSM map does not have API keys.
You can obtain an API key from the map producer Thunderforest. They provide ...
- 75.9k
7
votes
Accepted
How to get layer variables using QGIS Python APIs?
You may use the QgsExpressionContextUtils() class.
More in detail, you may set a new layer variable in this way:
layer = iface.activeLayer() # or similar way for loading a layer
...
- 15.9k
6
votes
Implementing Add Feature action using PyQGIS
A complete solution with also saving the layer, as requested in a comment:
# Get the active layer
layer = iface.activeLayer()
# Define a function called when a feature is added to the layer
def ...
- 346
6
votes
Accepted
What are the differences between a WFS and a simple API?
A WFS is just an API but conveniently one where everyone has agreed a standard way of talking to it beforehand. So rather than having to read a new bunch of documentation and write some new code for ...
- 78k
5
votes
Ways to extract DEM for urban areas using Google Maps?
Alternatively, a DEM with global coverage that might suit you is the SRTM 1 second DEM. This was recently released and has a resolution of about 30 metres. Read about it at http://www2.jpl.nasa.gov/...
- 1,343
5
votes
Ways to extract DEM for urban areas using Google Maps?
The Google Elevation API is not accurate enough at a Building level.
You can test it out by using going to http://www.daftlogic.com/sandbox-google-maps-find-altitude.htm
Just search for 1 World ...
- 40.6k
5
votes
Export .qml file using QGIS API
You can use QgsMapLayer::saveNamedStyle to export .qml files:
layer.saveNamedStyle('/path/to/style.qml')
EDIT:
Yes, you can create a .qml file outside QGIS. I tested this in a standalone script (...
- 74.1k
5
votes
Accepted
Improving buffer smoothness using PyQGIS?
You can use the buffer() method. It applies to a geometry object. For example, using the following code:
layer = iface.activeLayer() # for example
for feat in layer.getFeatures():
geom = feat....
- 15.9k
5
votes
Accepted
Download MODIS/MCD19A2 AOD product with R
This can be easily achieved using the MODIS package, version 1.1.3 or higher (previous versions didn't provide access to this product).
library(MODIS)
# set MODIS options (these can also be passed ...
- 5,133
5
votes
Accepted
EPSG.io API for PROJ definitions
You are using the official site epsg.org, not epsg.io that is run by a private company. EPSG/IOPG supports only the standard formats WKT and GML. The epsg.io site supports other kind of definitions ...
- 58.9k
4
votes
Geocoding APIs comparison
There is a free REST API at http://matchbox.io. It standardizes the address and returns lat long as well as other information. For example:
http://api.matchbox.io/address/?addr_1=1390%20Market%20St%...
- 141
4
votes
Choosing OpenLayers or Leaflet?
It depends on what you are trying to do. Leaflet is simpler and faster for 80% of web map projects.
The same way you don't need a spaceship to go around your neighborhood, most of the time I found ...
4
votes
Accepted
Google Earth plugin deprecated. Which alternatives?
Besides Cesium, the following alternatives could be explored for simple globe visualisations:
D3js. See for example this demo, that other one, and this tutorial.
Kartograph. See this example.
...
- 10.1k
4
votes
Accepted
[GDAL API]: can't save image in some formats
I've caught my error. May be it will be helpful for somebody.
CreateCopy() makes read-only Dataset for PNG and JPG, so RasterIO() doesn't write anything into dataset's bands. We have to call ...
- 123
4
votes
NOAA API data for past monthly mean Temperature and precipitation
From the looks of it, you are getting a python error because the headers argument is expecting a dictionary, not a string
The following works for me on the entire date range:
import requests
url = "...
- 6,898
4
votes
Accepted
is it possible programmatically to rotate a svg of the feature without rotate all feature
In QGIS styling is layer based, so it is generally not possible to set different styles or different symbols for individual features. I think this is because features are handled by the data source, ...
- 2,040
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