A reference framework consisting of a set of points, lines, and/or surfaces, and a set of rules, used to define the positions of points in space in either two or three dimensions.

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finding of latitude and longitude of some points of a path in Google map

Is there any coding to find the latitude and longitude of some points of a predefined path in Google map?
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13 views

Why is this .prj file causing the shapefile to render in meters instead degrees?

So I've got a shapefile that has polygons of countries, with coordinates in decimal degrees: Country (String) = Algeria POLYGON ((6.928073999999953 36.88360652, 6.949973999999969 ...
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2answers
89 views

CRS for submission to Minnesota DOT

Does anyone have experience using QGIS to submit shape files to the Minnesota DOT (MNDOT)? I am using EPSG:26915 but got rejected due to an error in the CRS. MNDOT Specs call for "UTM coordinates, ...
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21 views

If I were flying over a flat world at constant elevation, taking aerial photos, how would I patch them into a mosaic?

I'm not sure if this is the right place to post this question (please comment on this rather than downvote, etc), but if I were flying over a 2 dimensional world, at a constant altitude, taking aerial ...
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1answer
112 views

How to find the projection of an image?

Instead of georeferencing the image and deforming it, I'm trying to find the projection used by the author of the image. I've got tens of these distribution maps to digitize. The idea is to avoid ...
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1answer
26 views

Determining projection of Texas county shapefile?

I have a Shapefile of San Jacinto County in Texas. It thinks it is NAD83 UTM Zone 15N, but the dataset isn't jiving with any other dataset. Max X: 1,073,721 Max Y: 11,223,970 Min X: 895,728 ...
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13 views

Question about projected coordinate systems 30m DEM for Contiguous US

What is the best Projected Coordinate System (PCS) for the contiguous US (whole, not parts) if I want to maintain distance and area accuracy as much as possible across a nationwide DEM dataset? I'm ...
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1answer
47 views

Defining projection, reprojecting, and wrong area values [duplicate]

Apologies for duplication--this was mentioned in a previous post, but was suggested that this specific problem should be posted separately. My data: http://water.usgs.gov/GIS/dsdl/aquifrp025.tar.gz ...
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2answers
26 views

Identifying my coordinates from external datasource

I'm working with data received from an agency outside of my office and two columns in the dataset are labeled 'CompX' and 'CompY'. Here is a sample set pulled from the spreadsheet: ...
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1answer
16 views

XY data --> NAD_1983_2011_California_Teale_Albers always fails?

In ArcGIS 10.2, I am importing XY (point) data from excel, and have been having trouble projecting it into the following Projected Coordinate System: NAD_1983_2011_California_Teale_Albers -- NAD ...
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1answer
31 views

Counting number of points in 1 km grid covering surface of Earth?

I want to cover surface of earth with equal sized shapes and count number of points within each cell. shape of cell doesn't matters (triangle, hexagon ...), neither area, but equality of them is ...
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3answers
120 views

Does the NED use geocentric or geodetic latitude?

What kind of latitude does the National Elevation Dataset (NED) use? Geocentric or geodetic or something else? I can't find the information anywhere on their site (http://ned.usgs.gov/index.html) or ...
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34 views

Calculate end point Height above the MSL of the target point given a starting point, distance, azimuth and elevation [duplicate]

We need to find the end point height (from the earth surface) given the start point lat, lon, azimuth (270 deg), distance (500 km) and elevation above the horizon of start point (10 deg). The ...
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1answer
58 views

Moving object of fixed dimension without distortion

I am trying to move a polygon object in a shapefile to a new location. I will perform an offset so that the process can be automated by shifting the object to a new geographic coordinate or moved by ...
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2answers
149 views

Converting from an x-y coordinate system to latitude/longitude

I'm building an indoor wifi-based tracking system that can calculate the position of a device in meters relative to the sensors distributed throughout the building. So far I've gotten to the point ...
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1answer
26 views

ESRI : 54019 or World winkel II in QGIS

Currently I didn't find World winkel II or ESRI : 54019 coordinate system support in qgis. One of our client using this.. Can any one tell me a solution to load shape files,which are using his ...
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3answers
33 views

How to convert crs projection of Map in qgis

I am totally new to GIS. I have a qgis project. I am adding the screenshot. As you can see the map is sort of rectangle in projection. How can i project it like this (without the grids) Thanks ...
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0answers
31 views

What projected coordinate system to use for whole of USA? [duplicate]

I need to determine a projected coordinate system for a wide area that exceeds more than one zone? For Example: If I want to give US a UTM projection which zone will be represent the whole US? ...
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2answers
39 views

How to calculate x/y in a different coordinate system in QGIS 2.4?

I'm trying to calculate Northing Easting in QGIS. I can get it to calculate my lat/long using $y and $x in the field calculator. I changed coordinate systems to what I want it displayed at, but it's ...
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0answers
28 views

How do I convert Lon and Lat to pixels in map using world file?

I have a tiff map file, with a tfw world file that has these parameters (lon/lat in radians): 0.00000107180145766 \\ A 0.0000000000 \\ D -0.0000000000 \\ B -0.0000009331315579 \\ E ...
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0answers
12 views

what is the output coordinate system when I use Near3D tool in ArcScene?

I added a 3D rectangular surface (rectangle formed by 3D points) and a 3D point as two different shapefiles and then I tried to use Near3D tool. Then it gives an error "Datum conflict between input ...
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19 views

how to transform sinusoidal cordinates in MATLAB [duplicate]

I am working with the Mod10a2. I want to convert MODIS HDFs with sinusoidal projections to WGS84 in MATLAB. i want to find the corresponding X & Y of the each pixel and then convert them ...
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1answer
41 views

which Coordinate system should I use for 3D analysis?

I am creating 3D surface below the earth's surface using ArcGIS and then I need to find distances to the plane from the surface. Which coordinate system shall I use? 3D interfaces like IProximity3D ...
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37 views

Why can't I reproject from HARN State Plane Ft Intl to State Plane Ft?

I'm attempting to reproject a feature class that is: NAD_1983_HARN_StatePlane_Oregon_North_FIPS_3601_Feet_Intl to our standard, which is: NAD_1983_StatePlane_Oregon_North_FIPS_3601_Feet When I ...
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1answer
30 views

How to adjust the projection of a buffer?

I'm using ArcGis 10.1, and when I do a buffer at a point, the created buffer do not match the dimensions I asked for. For example, in the creation of buffers, in the option 'linear unit' I choose 50 ...
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1answer
26 views

Draw arc in Geo map WGS84 coordinate system

im trying to draw an arc in OpenLayers, in non Geo map it works well and here is my code: function calculateArcPointsNonGeo(center, radius,startAngle,endAngle,segments) { var pointList = ...
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2answers
61 views

How to add .shp file to ArcMap? [closed]

Ive spent the last 12 hours trying to figure out how to use ArcMap. Ive made about 2% progress. I attached the link to the .shp files at the bottom. Ive been exporting .shp files via Pathfinder ...
4
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1answer
76 views

What's the correct way to reproject a population raster?

I'm working with a population raster that is in the WGS84 coordinate system, and I want to get it into a projected coordinate system (Albers Equal Area), using ArcGIS 10.1. According to the metadata, ...
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2answers
68 views

Can't find correct coordinate system: UTM83 Zone 15 forcing input in meters; need it to be read in feet

Forgive me, I'm a CAD person, and am very new to GIS. I've searched google and this site extensively for an answer, with no luck. My problem is that I was given a large number of sistered Raster ...
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1answer
40 views

Raster and vector layer in the same CRS don't match

While adding multiple raster and vector layers (and setting them all in CRS WGS84) in QGIS 2.2, they don't seem to overlap. Interestingly enough, only raster files overlap between each other, the same ...
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1answer
42 views

How do I display NYC community specific data on an interactive map without longitude/latitude coordinates?

I have downloaded the NY Department of Sanitation's Monthly Tonnage Collection data from https://data.cityofnewyork.us/City-Government/DSNY-Monthly-Tonnage-Data/ebb7-mvp5#revert and I want to use this ...
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2answers
50 views

Convert from WGS84 to GDA94/MGA94 on iOS

I have a mobile app (iPhone/iPad) for recording data and taking notes, including photographs, and a government client needs GPS coordinates attached to each photo. They require coordinates in the ...
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1answer
37 views

Projecting GCS Australian 1984 to WGS 1984 UTM (or similar) to get units of meters?

I am currently trying to run a kernel density analysis and need to change the co-ordinate system to a UTM measurement in order to set some meaningful biological constraints to my seabird data (eg, ...
3
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2answers
44 views

Choosing projection to use for Least-Cost Path analysis at continental scale?

I am trying to find least cost paths from the southern USA to the Great Lakes region (for example). My resistance layers are currently in an equal area projection but I'm wondering if I should convert ...
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1answer
72 views

Using Google Map Spatial Reference to plot HeatMap?

Basically I am trying to plot a Google heatmap based on the JSON objects returned. Here is my JavaScript: function getHeatMap() { var gradient = [ 'rgba(185, 185, 203, 0)', ...
2
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1answer
71 views

Which projected coordinate system should be used for mapping the US?

I'm on a project requires integrating data for all states in the US. It means I have two roadway datasets and I'm going to assign the attributes of roadways in one dataset to the same roadways in the ...
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1answer
31 views

Can't get SRS from PostGIS using Proj4 text

I'm having a problem transforming a point from the Australian MGA UTM datum (eg MGA Zone 51 http://spatialreference.org/ref/epsg/28351/) to WGS84 using GeoDjango. I've narrowed that down to a problem ...
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0answers
43 views

Creating a custom Lambert Conformal Conic projection in ArcGIS 10.1 and/or 10.2.2

referring to the table below, I am trying to use the values on the left from another program that uses different terms for the parameters of a custom projection. I just wanted to make sure that ...
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1answer
28 views

Reference Coordinates System bounds

I have a catalog that contains different coordinates system definitions. I have a web interface where one should be able to see a given coordinate system extent in a google maps view. My question ...
4
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2answers
118 views

Using Spatial References with ArcPy after *.prj files no longer installed by ArcGIS 10.1 for Desktop?

I'm writing a python script that uses the CreateFeatureclass_management tool, without a template. One of the required parameters is a spatial reference. I used to be able to point to the system *.prj ...
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0answers
18 views

QGIS Google satellite layer moving each time it's turned on [duplicate]

I have imported location data in a text layer, CRS = WGS84 and have put in Google Satellite and Google Street (WGS84/pseudo mercator) in but each time I switch on a Google layer it moves relative to ...
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1answer
45 views

The create feature task could not be completed. the coordinates or measures are out of bounds

I'm trying to create a layer based on a feature class, in ArcMap (I've created a geodatabase from Arcatalog and linked it to PostgreSQL). The feature class that I've created is registered as ...
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1answer
54 views

Coordinate System Alignment

I have four shapefiles with different original projections that I am trying to bring into ArcMap 10.2. How do I set these four shapefiles to a single projection that will display the layers correctly? ...
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2answers
47 views

How to set a coordinate transformation GRID

Does anyone know how to set a coordinate transformation in qgis so I can measure the distances in meters or kilometers? If anyone has a clue, would be just great. Thanks!
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2answers
40 views

Coordinate Reference System issues between SHP and Raster file

I am having an issue with the CRS of a given Aster DEM. I have downloaded a Aster DEM from www.oziexplorer3.com which comes with the EPSG:4326 - WGS 84 as the CRS. This is a DEM from Gabon, and all ...
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3answers
83 views

How to measure areas using an official CRS which is not available in QGIS?

I am very new to QGIS and doing a project on Glacial Lake Outburst & Flooding (GLOF). I am trying to find the area of a lake using images from Google Earth 7.0.3.8542. I am using the WGS84 CRS ...
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1answer
57 views

ArcGIS Conversion Error While Converting ED50 Datum to WGS84 Datum

With ArcGIS for Desktop, I tried a datum conversion of Transverse Mercator ED50 Datum to Transverse Mercator WGS84 Datum. Normally, the difference between two projections is approximately 180 meters ...
2
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1answer
38 views

When to reproject LAS data?

I've downloaded a few LAS files from the NOAA: http://www.csc.noaa.gov/digitalcoast/data/coastallidar I used lasinfo to get the coordinate system of the LAS files and it returned: ...
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0answers
48 views

I'm new to GPS, and I had a quick question about clarity.

I'm working on a project for class, and I'm mapping GPS on Google Earth with a KMZ file. I used a handheld GPS 24°6.691'N + 74°27.833'W. How accurate is my coordinates? I know I'm in decimal ...
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2answers
78 views

How to get the Measure Line in Yards (not Feet)

I'm using Qgis Dufour 2.0.1 and the Openlayers Plugin for images. I'm working on a golf course project where everyone thinks in yards. I've tried different CRS (now working the State Plane Missouri ...