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1

After I checked my data source and used different GIS Tools (under them 3DEM a really nice DEM Viever, that gave me the right heights), I came to the conclusion that the grayband values, that are shown by QGIS, when you drag your DEMs in it, are simply wrong and aren't the height values. Both SRTM and ASTER DEMs store (in general) their data in meter. If ...


1

For a line, it is a plunge and not a dip (for 3D planes) It is an elementary problem in analytic geometry: The distance = SQRT((x2 –x1)2+(y2 –y1)2+(z2 –z1)2) The plunge = arcsin ((z2 – z1) / distance) The azimuth = arctan((x2 –x1)/(y2 –y1)) (always in two dimensions) The value θ returned will be in the range of ±90° and must be corrected to give ...


2

One option that may be a bit faster (less clicks) or you could call from a script would be to use ogr2ogr command (using OSGeo4wShell (which comes with installation of QGIS)). ogr2ogr -f "ESRI Shapefile" C:/Temp/Shps C:/Temp/test.gdb If you want to export out a subset you may use the same command above but at the end list out the table name(s) (e.g. ...


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File Geodatabase in QGIS 2.4 Note: Use Directory rather than File Once the file geodatbase is loaded save the shapefile


2

The point feature is a bit more straight forward once you have your table in excel (with your X and Y columns), save it out as a .csv and you may use the Make XY Event Layer tool to convert to event layer and then use Feature Class to Feature Class tool to convert to shapefile. The polyline and polygon are not as straight forward, you will have to build a ...


0

On the FME side of things you need to add a DateFormatter transformer into your workspace. Use it to convert the source date (20140522000000.000) to ISO DateTime (2014-05-22T00:00:00) Also make sure the GML Writer is set to use a DateTime for the output, and not a char field:


4

I've worked with LEHD data before, including in a GIS context so I can probably clear up some of the confusion. First off, S000 does not represent a point, it represents an attribute. Secondly, I can tell that user26056 is working with Origin-Destination data because the GEOID's in the w_geocode are repeating and the S000 usually shows a bunch of 1's for ...


1

You do not explain what kind of data you have, but if it is point data you should be able to use QGIS to do point on polygon analysis. Here is a link to a article about this: http://maps.cga.harvard.edu/qgis/wkshop/pt_in_pgn.php BTW - Census block data are stored as vector polygons, so you should not need to transform your data to raster


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If I understand your question correctly, you could try the following: Add the .csv file with the 450 locations layer as a Delimited Text Layer and select the appropriate options Add the other .csv file again as a Delimited Text Layer but select the No geometry (attribute only table) option From the Processing plugin, select the Join attributes table ...


2

There are two things in that zip file: the "raw" raster data koppen_ics a layer file The layer file is just a pointer to the original data, with additional information about symbology (in this case, providing short text names for the various climate zones). Layer files are useful for saving a set of layers and symbology, but they can't be used if the ...


2

Well, before you convert the database, you could run the Domain to Table geoprocessing tool http://resources.arcgis.com/en/help/main/10.1/index.html#/Domain_To_Table/001700000022000000/ which should convert a domain to a stand-alone table that you could put in the database. Then, you should be able to just convert the database, including stand-alone tables ...


2

From a cartographic point of view, it is commonly assumed that the human perception of a line position is around 0.3 mm. For a given map scale of 1:20,000 or smaller, the USGS’ NMAS has established that 90% of all the points tested must fall within 1/50 of an inch (0.5 mm) (as measured on the map) to their known positions on the planet (see here). This can ...


0

You can use the ArcGIS SDK for iOS to reproject coordinates from WGS-84 to GDA94. The SDK is a free download from developers.arcgis.com/ios and docs are found online here. Converting points, lines or polygons is a simple operation using the AGSGeometryEngine class. This code snippet, converts a CLLocation object called location from WGS-84 to GDA94: ...


0

As far as I know, QGIS doesn't support the .fdshape file extension. But maybe you can go along with the converter you can find here? It allows you to export/convert .fdshape files to .shp files. There's also a manual for that tool.


1

There's another page on the GeoScience Australia website at http://www.ga.gov.au/scientific-topics/positioning-navigation/geodesy/geodetic-techniques/calculation-methods#heading-4 which contains a link to an Excel file. If you download this file, then un-hide rows 8-39, you may be able to unpick their formula and apply it in your app.


2

This is a common issue, translating between mapinfo rasters to arc/Q can lead to positional errors. Converting using a tab-to-tfw tool will give mixed results but usually the rasters will be about 20-30m off. I would recommend either opening them in Arcmap (arc can read the georeferencing information in the tab file) and saving out a copy from Arcmap, or to ...


1

What I am doing in such cases is basically exporting every layer separately. Then import them all to any gis software. If you have auto cad map, it can export shp-s, for example, keeping layers in separate files. Then you also have to style every layer properly in gis. If you don't have auto cad MAP, you can save each layer to dxf, and import that to esri. ...


2

Exporting DGN to DXF and then using ogr2osm seems to do it.


0

Layer>Save As (Select KML) [Data is in OSGB36 Ordnance Survey GB] Open in Google Earth to check it is in the correct position


2

gdal_translate -of GTiff C:\temp\input\a.img C:\temp\output\a.tif and the batch option GDAL_translate: converting ESRI GRID to Geotiff in batch '-of GTiff' this part is probably not even required as this is the default but will do no harm.



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