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I have a USB GPS device I use on linux using GPSD. The device is SiRF/NMEA compatible but on booting up it starts up in SiRF mode and I need NMEA mode so I use "gpsctl -n" in my startup script but this does not always guarantee NMEA mode. Does anyone know a workaround? أكثر...

I have features in drop down list.when I select feature in drop down it is zooming to that layer.Now I wanted to highlight that zoomed feature.how can I style the zoomed feature? can any one help me to achieve it? here is my zooming function: var owsURL =...

I have two different roads shapefiles. There are roads present in my second shapefile which are not present in first shapefile. I want to append all those roads from second into first one but i want that they must snap with the nearest roads. There must not be any gaps between them as there are...

Hosting an extremely large (10-100x ram size) image pyramid via WMS has disk access characteristics closer to a random read, but generating the pyramid is a CPU bound sequential operation right? أكثر...

Like the title says, I'm building a webgis using Leaflet. I want to allow users to export maps from the website and download them, but the current downloaded format is shapefile. I wonder if there's a configuration that enables export format as pdf. As it may be related, the maps only show the...

I followed the tutorial from http://schoolofdata.org/2013/04/27/creating-a-map-using-qgis The France map is from NaturalEarthData and tour de france data is from another source. They used different CRS (i.e., ED50 and WGS84 respectively). I was wondering why the map and the data has different...

Our humble geoserver instance needs to be able to host GEOTIFF image pyramids ranging in size from a few gigs to a few TBs. A NAS appliance with raid 10 seems smart from a maintenance/expandability perspective but wouldn't a few internal SSDs beat the snot out of it performance wise? related...

How to show text above polygon-fill ? I do not want to change the polygon-opacity as I would like to keep the solid color of the polygon, but how do I show the country name label text ON TOP/ABOVE the polygon-fill? Please assists. Thank you in advance. ` #country_label[zoom>=3] {...

Needing Help. How can we prepare soil type map using Satellite Data. أكثر...

I've downloaded the county boundaries (1 million scale) from this link: http://nationalmap.gov/small_scale/atlasftp.html?openChapters=chpbound#chpbound A sample of the attributes in the dataset is: ADMIN_NAME, ADMIN_FIPS, STATE, STATE_FIPS, NAME, SUFFIX, POP, SQ_MILES, PRIM_MILES, COUNTYP010...

The following seems to be an amalgamation of questions Is it possible to represent points as sparklines in ArcGIS for Desktop? and Pie-Chart Coordinates in QGIS. Basically I have 5 sets of observations for n regions (the Australian Bureau of Statistics SA2 geography). Each set of observations...

This question already has an answer here: What's the difference between a projection and a datum? 11 answers Are the datum and the ellipsoid the same? What is a Datum? The Earth is shaped like a...

I have a shapefile that represents counties (admin 2) only, but I need to create a state level (admin 1) polygon file (I'm using QGIS). I will need to sum up (or average) the relevant data at each district level as well. There are far too many counties to do this manually, so does anyone know of...

Summary: Reporters: Do you want to interview USGS scientists as they measure flooding? Please contact Jennifer LaVista. Contact Information: Jennifer LaVista ( Phone: 303-202-4764 ); Reporters: Do you want to interview USGS scientists as they measure...

Nimbus and nuclei and the near-infrared all bring us earth science joy. أكثر...

كلمة رئيس الجامعةبن رقوش، جمعان رشيد أكثر...

Looking at the Wikipedia page for the North American Datum, it seems to imply that the datum is completely defined by the ellipsoid, which defines the major/semi-major axes, flattening, etc. For geodetic coordinates, are a datum and an ellipsoid definition the same thing? Can the terms be used...

I am running ArcGIS 10.3.1 for Desktop and for some reason my icons in the ArcToolbox and in other windows are behaving very very strange. Sometimes no icon at all appears, other times the completely wrong icon appears. The icons will randomly change each time I load a new MXD. I have searched...

After a hiatus in the Winter 2015 quarter (January through March), GeoCurrents came back with a wealth of posts on a variety of topics, ranging from major world news, such as the war in Syria and the Mediterranean migration crisis, to often-overlooked corners of the world, such as Socotra and...

I am attempting to wrap my head around a modeling workflow for gun safety. I have been tasked with developing a model that would identify locations where discharging a firearm would result in the bullet crossing a road. My challenge is that an individual could fire a shot in one direction that...