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i am trying to extract specific data from an .nc file my nc file has the following variables hur-relative humidity lat-latitudes lon-longitudes time-time plev-pressure levels so i want to get the data of relative humidity for a specific plev and specific time library(ncdf)ncin

Carrying on with the theme of linking GIS to NetLogo for creating agent-based models. We would like to showcase two simple models. Both are based on using a shapefile to create Schelling-inspired segregation model. In the first model (as shown in the movie below) we use the polygons to be...

There are a number of new channel math functions in the latest release for Oasis montaj 8.5 and Target 8.5.   You can find them in the Channel Math Expression Builder under Database Tools > Channel Math... Expand the Operators and Functions section to see the new options. Additional string...

By Ruth Etzel, MD In October we celebrated Children’s Health Month. As I reflect on the month, I think of the many exciting events and activities that highlighted the importance of our work to protect children’s health. One event in particular, a meeting of The President’s Task Force on...

How do we measure OpenStreetMap’s data coverage? One approach is to compare it against established references like the CIA World Factbook. As a US Government work, the Factbook is publicly available and freely licensed, and it contains measurements of paved & unpaved road lengths in every...

I have two sets of shapefiles, one point data and one polygon data. Both were sent as part of a bigger set of data. Neither the point or polygon data will display when loaded into QGIS. The raw data has not been edited, the CRS is correct for the project and layer (27700). I have tried multiple...

I had to change my data frames coordinate system from a custom coordinate system (ETRS_1989_UTM_Zone_32N_6Stellen) to ETRS_1989_UTM_Zone_32N_8stellen. The only difference between both systems is a different value for False Easting. Before the change the symbol I use for swamps looked like this...

I'm fairly new to GIS and don't do a lot of complicated stuff, so please bear with me! I don't think this has been asked before, I did have a search but couldn't quite find the answer I was looking for. I often have to manually measure the distance between a single site and other sites around...

I have created multiple raster images with GRASS-GIS (~150Gb), that I'll need to multiply for a certain coefficient, and query the results that need to by saved just temporally. The portions of the raster image that need to be queried are identified by the selection of some polygons contained in...

I am building a composition with map, legend... I want to add a paragraph (text) to the composition but the text only recognize one word. What I am doing wrong? Code: text = QgsComposerLabel(myComposition)text.setText("Prognostico" + "\n" + "Coordinate System: ETRS89 PTTM06" + '\n' +...

Quanergy Systems, Inc. will introduce in early 2016 the world’s first solid state LiDAR (Light Detection and Ranging) sensor for self-driving cars for less than $1,000 per car, it was announced today... Click Title to Continue Reading... أكثر...

Summary: Piping plovers, a federally threatened species of shorebirds, are likely losing wetland breeding habitat in the Great Plains as a result of wetland drainage, climate change or both, according to a new U.S. Geological Survey study Contact Information: Marisa Lubeck...

We have released a new feature, available in GIS Cloud Manager and Map Editor. User Groups feature is used for simplifying the process of creating, managing and editing custom user groups for the purpose of assigning a set of permissions to all of the group members at once. In cases when there...

By Janet McCabe November 15 marked the 25th anniversary of the Clean Air Act Amendments of 1990. A lot can change over a quarter of a century, and air quality is a good example. Our nation can be proud that we have improved our air quality dramatically during the last 25 years. This success is...

السلام عليكم ورحمة الله لوسمحتم ممكن توفير رابط لتحميل برنامج Spectrum لعمل الأسقاطات السكانية مع شرح لهذا البرنامج ولكم جزيل الشكر أكثر...

I have a simple project — a base map and a gpx track. The basemap is from OpenLayers. I want to change the map the CRS to Arizona Central so I can use miles as units for QChainage. When I change away from the default WGS84, my GPX track disappears. I've tried to set the Layer CRS for the...

I have gone through the CartoDB.js toggle map view tutorial, and I have been successful in linking up SQL queries to a handful of buttons. Now I would like to instead control these functions with a Bootstrap (or similar) dropdown menu, to reduce the clutter on the screen. However, I am having...

We have a web-based mapping application that uses the ESRI JS API. We would like to disable panning with the numeric keypad. There is a method in the API, esri.Map.disableKeyboardNavigation(), that disables panning with the dedicated arrow keys and leaves the numeric keypad enabled. We want just...

I have about 2500 hospital points with names and addresses across the nation. My goal is to create a polygon layer of perimeters for these hospitals. The perimeter shape should look like what's in Google Map. Below is an example. What's the best way to achieve this? Any suggestion is highly...

I have the following code in Python for a tool I want to build. For some reason I am getting a parsing error in line 23 that doesn't exist. Also when I am trying to define the output workspace every time the file I have created inside the Input folder is deleted. Why? I am using ArcGis 10.2.2...