Tag Info

Hot answers tagged

4

I'm not familiar with programming in JavaScript but in the OpenStreetMap Wiki there is a section describing "Mercator". Following this link you'll find a sample code snippet to tranform from lat long to mercator. I actually don't know if it's correct because I did not test the code.


3

The most robust way to do this, is to use GDAL's ogr2ogr functionality. Since you know your datatypes, you can specify them in VRT file. The documentation has this to say about setting field types: Field (optional, from GDAL 1.7.0): One or more attribute fields may be defined with Field elements. If no Field elements are defined, the fields of the ...


2

GPS Visualizer will pass your time stamps to gpx format. Using the online tools will preserve your timestamp in the .csv file. Convert a GPS file to plain text or GPX This form reads a tracklog or waypoint file (in a recognized format) or plain-text tabular data, and converts it to an easy-to-read tab-delimited or CSV text file, or to a GPX ...


2

You are actually trying to create a DEM (Digital Elevation Model). My suggestion is to go withy your first option: Import CSV and make a XY event layer. Than export it to a point feature class with the Z-values as altitude. Use the "CREATE TIN" tool to create a triangulation vector surface. Use "TIN to raster" tool to create a DEM. Another method would ...


2

If you use geojson.io, it will not mess up the property data types. Import the csv file into there, then export it out as geojson.


1

Taking CSV data (test.csv) from Devdatta Tengshe's answer: Latitude,Longitude,Name, Ht 48.1,0.25,"First point", 3 49.2,1.1,"Second point", 56 47.5,0.75,"Third point", 67 In QGIS you need a *.csvt file (test.csvt) for considering data types. In this case: Real, Real, String, Integer At the next imagen it can be observed that the csv layer 'type ...


1

http://ogre.adc4gis.com/ Supports CSV and a number of other extensions.


1

Try the Copy Raster tool. It's converted things to GRID for me in the past quite reliably. http://resources.arcgis.com/en/help/main/10.1/index.html#//001700000094000000


1

I think you might use Add Join as mentioned above. Yet I belive that Join Field will be of a better use. It simple works as Add join, but adds flexibility to the process, enabling to add only some fields, or all of them. Otherwise, "regular join" will join all fields, which can make quite a mess with big datasets. To elaborate on the "conversion" to ...


1

In your spreadsheet, you should first convert your coordinates into decimal degrees degree + minutes / 60 (+ second/3600, but you don't have seconds) from the text string(assuming excel recognize your dot as a decimal separator), it would be =LEFT(A1;SEARCH("°";A1)-1)+ RIGHT(A1;LEN(A1)-SEARCH("°";A1))/60 Because you are South and East, you also need ...


1

Right click your table in the "Table of Contents" click "Display XY Data." Choose whichever fields map to X, Y, and Z, then choose your coordinate system. Right click the event layer, and export to your desired location.


1

Old question, but if you haven't figured it out by now UTM is not a coordinate unit. UTM is a projected coordinate system (aka CRS, what I think you mean in your comment) whose units are meters. WGS84 is properly a datum, but also refers to a geographic coordinate system whose units are degrees. Projected is flat, geographic is 'round'. It just so happens ...



Only top voted, non community-wiki answers of a minimum length are eligible