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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27 views

Projection issues with merging files. [duplicate]

New QGIS user, 2.6 Brighton. My project CRS is default to Nad83ft / N.Carolina (US). I loaded various polygon and line (provided to me) that have various CRS's but they still show correctly in place ...
2
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1answer
58 views

How to project a GeoJSON on the fly in OpenLayers 3?

I have been trying to load a GeoJSON without success. I have a map with a background layer from OSM. I have some data in 4326 I want to overlay on that map. I do not want to transform coordinates one ...
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1answer
43 views

Changed Projected Coordinate System back to original but, Shape_Area field is still off by about 55 SF

I recieved some GIS parcel data a little over a year ago. This data is the basis for the majority of my work. About a week ago I noticed that the Projected Coordinate System had somehow been converted ...
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0answers
35 views

Unknown coordinates in Shapefile, projecting doesn't give expected results

I'm reading a Shape file (four files actually, .dbf, .prj, .shp and .shx) containing polygons representing certain areas in my neighborhood. For this I use C# and a library called DotSpatial. I can ...
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0answers
34 views

Geographic coordinate system and datum [duplicate]

I am bit confused about datums used to define a localised coordinate system for a specific area. Definitions say that, datum defines how a certain well-established point (i.e., reference point) on ...
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57 views

Calculating distances in Geographic Coordinate System using ArcGIS for Desktop?

I work in a Geographic Coordinate System and using the "Generate Near Table" tool in ArcGIS 10.2 for Desktop. I want to calculate the distances that each feature of the point layer has to the closest ...
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2answers
76 views

Shapefile created in QGIS will not display properly in ArcGIS

I was asked to created a point shapefile of a cemetery. The points display correctly in QGIS but not in ArcGIS. I think the issue is with the coordinate system I created it in (WGS 84 / UTM zone 17N). ...
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1answer
66 views

Postgis query to convert UTM to Lat long

I want Postgres/PostGIS queries to convert UTM coordinates from UTM 43N projection to Decimal Degrees 32643 projection. select ST_X(the_geom), ST_X(the_geom) from table
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2answers
80 views

Find unit of EPSG-Code

I need a way to find out the unit of an EPSG-Code (e.g: meter) from java (ogr, gdal, osgeo?) but any other approach would be fine as well. I want to do something like: if(epsg.unit==meter){ do ...
4
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1answer
64 views

Equal area projections with different area results in ArcGIS for Desktop?

Using ArcGIS, I have to calculate areas of huge polygons all over the Pacific Oceans betwwen 20N and 30S. I have been trying different Equal-areas projections (Cylindrical and sinusoidal for example) ...
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24 views

Mapfish print v3 returns org.opengis.referencing.NoSuchIdentifierException when using custom CRS

I'm trying to print in CRS, which isn't defined by default. I added definition of this CRS to epsg.properties, restart application and tomcat7 but still getting Error while processing request: ...
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1answer
31 views

What is the formula for converting from WGS84 to EPSG:3071 (Wisconsin Transverse Mercator)

I have GIS software that can do this conversion but I need to know the actual formula / math involved. I'm writing code and need to perform a single conversion (WGS to EPSG:3071) so using a library, ...
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0answers
35 views

Issues in projection while defining data frame extent by coordinates

I'm trying to set the following coordinates to a dataframe: custom_extent = {1:-87.678956, 2: -87.611652, 3:41.867129, 4:41.954932} where 1 is key for XMin, 2 is key for XMax, 3 is key for YMin, ...
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1answer
131 views

Define spatial reference of layer in ArcGis JavaScript API

I get an error "Map: Geometry (wkid: 3301) cannot be converted to spatial reference of the map (wkid: 4326)" when I want to add only graphics layer. I found that spatial reference for a map is defined ...
2
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1answer
37 views

NZTM: Add 10 meters to a coordinate

Say I have the coordinates: N: 5413457.7 E: 1528677.3 If I were to add 10 to the northing value would that make the new coordinates point 10 meters north of the original point?
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32 views

Four parameter Helmert transformation using four points

I'm looking for an algorithm to calculate a Helmert transformation using four reference points. Plus, does anyone know how I can calculate the error once I've completed the transformation?
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3answers
136 views

How to georeference a map in UTM / WGS 84 (geographic) to WGS84 / UTM?

I have scanned UTM WGS 84 toposheets, with a geographic grid. I want to georeference them in WGS 84 / UTM (therefore with UTM coordinates). Should I: Calculate the UTM coordinates from the ...
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1answer
29 views

Converting SWEREF99TM coordinates to the “standard” coordinate system (longitude and latitude)

I recently asked a question about a coordinate system in a file, and found out that it used SWEREF99TM, but I can't figure out how to convert those coordinates to the "geographic coordinate system". ...
2
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1answer
13 views

CRS dialog no longer opening

I'm new to QGIS, so supect this is trivial, but it has frustrated me for the last hour or more... Last week whenever I added a csv as a layer once I'd filled in the first dialog it automatically ...
2
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1answer
44 views

Is there a 1.5:1 ratio coordinate system?

I'm a student fairly new to using GIS. I am doing a college project on using ArcGIS to map virtual worlds (such as the continents in World of Warcraft). The game programmers used a custom coordinate ...
0
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1answer
42 views

ArcGIS Online & Mobile Apps Projection Support?

What is the level of projection/co-ordinate system and transformation support accross the ArcGIS Online family of apps ; ArcGIS Online Web Map Viewer (Desktop) ArcGIS Online Web Map Viewer (Mobile) ...
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2answers
50 views

Unknown spatial reference in “Create Fishnet” files

I am working on an unprojected dataset (lat/lon) on a WGS84 DATUM, and for that region I have used the "create fishnet" tool from "Data Management Tools" in ArcMap 10.2, in order to apply a grid over ...
3
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1answer
105 views

Canadian Geodetic Vertical Datum of 2013 (CGVD2013)

"Natural Resources Canada (NRCan) has released the Canadian Geodetic Vertical Datum of 2013 (CGVD2013), which is now the new reference standard for heights across Canada. This new height reference ...
3
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1answer
87 views

methods for converting coordinate datum and format in python?

Related to an earlier Q&A of Missing grid shift files for cs2cs.exe? ... what are the various methods to convert coordinate datum and format in python? (Windows Vista, python 3.4) For example, ...
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14 views

Unable to execute the algorithm using SAGA LS factor

I tryed to calculate the LS Factor at SAGA, using a slope raster and the area raster, both at the same EPSG, and the error:Unable to execute the algorithm the error means something with the coordinate ...
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1answer
61 views

Why the Select By Location analysis calculates distance in a wrong way?

I want to select cities, which are within a distance of 200 km from my pre-selected city. However my result depends on whether I'm creating a buffer and use it to clip the cities (good result) or use ...
2
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1answer
101 views

Coordinate system doesn't contain values in the range -180 to 180 and -90 to 90

I'm creating an android version of a PC program (I've contacted the company who owns the PC program, so it's legal). The program is in the core a GPS, but is used to navigate pre-defined routes for ...
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0answers
57 views

Missing grid shift files for cs2cs.exe?

I'm trying to convert a coordinate to WGS84 degrees to NAD27 UTM on windows (vista 32 home basic), from python. I tried installing pyproj with no luck even after researching for a while; so decided ...
2
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2answers
40 views

Georeferencing a map image with no precise projection info

I am trying to georeference a map that has meridians and parallels etc. but no projected grid displayed. I can get the coordinates of the meridians/parallels fine, so georeferencing should not be an ...
2
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0answers
18 views

Error in Measuring distance using QGIS?

I am using the current Qgis 2.6.1 and having problems using the measuring distance function. The 'Measure Line' is giving me distances which is completely wrong and the scale shown was too big also. ...
2
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2answers
83 views

Can we no longer reference an ArcMap layer to get the spatial reference?

I'm currently using ArcGIS 10.2.1. In previous custom geoprocessing tools, I've used the following code to create a feature class in-memory, and set the spatial reference using an existing layer in ...
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0answers
28 views

Max length for WKT name

First of all, sorry if this is obvious or stupid questions. I am not very familiar with geographic information system. My question is, is there max length limitation on WKT name? see the bold text ...
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2answers
83 views

cannot get ArcGIS to project a shapefile

I am using ArcGIS 10.1 (SP1). I got a shapefile with polygons representing some features of the landscape in my study area. This file has been provided by a third party institution. The coordinate ...
0
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1answer
47 views

Export KML from GeoJSON in QGIS and coordinates change?

I'm very new in this area. I have a geojson vector layer file, with coordinates like { "type": "Feature", "geometry": { "type": "Point", "coordinates": [ 487677.2993499999866, 112018.26101 ] } }, ...
2
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1answer
70 views

UTM Coordinate Mapping Across Zones

I am building an application that requires me to plot UTM coordinates on a chart using CSV data. I am given two UTM coordinates for each record, although I would like the application to handle zone ...
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1answer
23 views

Expand zone 33X

I have coordinates in DDD MM.MMM Lat N80 45.00 Long E028 55.00 I want to convert these to UTM. Using a web converter i get 35X E534389 N8965867 So far so good. But I have seen these coordinates ...
0
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1answer
55 views

Converting DEM in degree decimal to meter using ArcMap?

i am trying to make cell size of satellite image and DEM equal for Maxent. cell size of satellite image is in metric but DEM is in degree decimal. how can i convert DEM in degree decimal to meter ...
0
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1answer
51 views

Transform lat,lng into x,y

I have coordinate system with x and y. Also I need to show there x,y point but I have coordinates latitude, longitude. How I can trasform latitude, logitude into x,y to show on x,y scale?
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2answers
50 views

Wrong projection reference in coordinate system - How can I modify the original coordinate system?

Working in Germany, where Gauss_Kruger is very often used (as well as ETRS1989_zone 32N), and trying to find out about WKID when I realised that on my machine, the projection reference of the ...
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2answers
83 views

WFS: How to specify input coordinate reference system

Geeoserver allows to specify output CRS by parameter srsName in WFS GetFeature. Is there a way to specify the input CRS? I am displaying layers of different CRSs in my map - all reprojected to ...
1
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1answer
121 views

Map Spatial Reference

I was having some trouble when trying to zoom to certain point in ESRI base map. So basically I got an ESRI base map and added a map overlay on top of it: function setMap() { function init() { ...
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0answers
34 views

Problem with Openlayers plugin adn Googlemaps [duplicate]

I have just installed QGIS 2.6.1 and I try to create a new project using googlemaps from Openlayers plugin but I am not able to zoom and move on the map. I have do not set anything so I was surprised ...
1
vote
1answer
35 views

What do I define the coordinate system of this data set to?

I have an excel spreadsheet with lat and lon columns, and 5 additional columns with associated data. I want to open the data points in ArcMap 10.2. I was told that the data was: based on a Lambert ...
3
votes
1answer
78 views

QGIS “ERROR 6: No translation for Lambert_Conformal_Conic to PROJ.4 format is known.”

I am trying to clip a county DEM file using the PLSS Section shape files as mask layers... that is, I want it clipped to sections so that I can load my DEM into QGIS one section at a time, without ...
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0answers
46 views

Leaflet CRS.Simple or CRS.EPSG3857 conversion Problem

I'm using v-leaflet (0.61) , a vaadin plugin, to visualize some layers over a map. Clicking on the map, I create a wms query to geoserver. The query needs some parameters and one of them is the bbox. ...
2
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1answer
58 views

Unknown Coordinates

I'm new at gis. I'm using Arcgis 10.2.2 and trying to geocode some addresses. I used a geocoding service which gave the coordinates in this format: POINT(102778.307715144 105888.168842117) I don't ...
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2answers
80 views

conversion differences going from 4326 to 26710?

there are two coordinate systems in question: "CRS 1" = EPSG:4326 (good ol WGS84) "CRS 2" = EPSG:26710 (UTM NAD27 Zone 10 (specifically, zone 10S but they don't seem to differentiate) For the ...
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1answer
73 views

mosaic dem with multiple coordinate systems

I'm sure this is a basic question, but I'm struggling to mosaic multiple DEMs (~40) into one large raster. The DEMs are 30m NED rasters from the NRCS data gateway, for the New England region. They are ...
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0answers
39 views

How to shift a CRS by an observed offset

I have a drone image is which is geo-referenced over a Google Sat. image. These align well, and both use WGS84-Pseudo Mercator (EPSG:3857). I have a set of data points in a shape file which are ...
3
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2answers
50 views

Generic term for CRS axes?

We're making a light web front to a database, and I saw this in a test screenshot: Despite those coordinates being nowhere near North America, the "latitude/longitude" label for those coordinates ...