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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4
votes
1answer
187 views

How to bulk import ESRI projections into Postgis

Where can I get a file that would allow me to bulk upload all of the ESRI projections into the spatial_ref_sys table of postgis. I know that you can get insert statements on spatialreference.org; ...
1
vote
2answers
554 views

How to debug GeoServer HTTP response code: 400?

We are using opengeo 2.4.3, and trying to open some layers with GeoServer through WMS. The different layers in the WMS file are detected, but when doing 'layer preview', we get the following error: ...
2
votes
1answer
33 views

Representing coordinates on non-earth globes in semantic data

There are standards to represent geospatial data in the context of linked data, such as GeoSPARQL. However, I could not find a way to represent the coordinates that are not on Earth - such as, for ...
0
votes
1answer
36 views

I want to have two raster data sets overlay

I am using ArcGIS 10.3 I have 2 raster datasets with different coordinate systems, but they are the same county (just different databases). When I add them to the same map layer they are far away ...
2
votes
2answers
81 views

How to create a QGIS map of unprojected data?

I am attempting to display data generated by Ubisense technology. The data contains non-geographic x y coordinates. I would like to load this data into a QGIS project to perform analysis. Is it ...
2
votes
1answer
21 views

Geotools produces different GEOGCS value for ESRI WKT

ArcMap creates following contents in .prj file for WGS 84. ...
1
vote
1answer
2k views

Using a Select By Location in Python and Calculating a field based on what State Plane a point falls in

Here's what I have so far. Do I need to make another feature layer based on the selection? import arcpy arcpy.MakeFeatureLayer_management(r"PATH TO THE POINT", "point_lyr") ...
1
vote
1answer
56 views

Guessing unknown projection in Malaysia

I have a database of northings and eastings of boundary markers of land parcels that are in a form that I cannot pin on any format. I would like to perform some conversions on them so that they can be ...
4
votes
4answers
130 views

How do I create a map that is not to scale in QGIS?

I want to make a map that isn't to scale and I'm so used to being pedantic about CRS and scale that I don't know where to start. The map that I need to make is a simple guide for people to get to a ...
9
votes
1answer
1k views

Using customized Coordinate System for Archaeological site data

I don't know so much about coordinate systems... In my office we use to deal with spatial data coming from archaeological sites. Each site has its own x-y-z coordinate system (GCS). Three simple ...
1
vote
0answers
30 views

Problem with reference system

I've imported in QGIS two vectors and setted the same reference system. First is a shape file, second is a csv file. The problem is that they are in different places, but they should be one over the ...
13
votes
2answers
557 views

Which projection is this data in?

I received a shape file for my project from an agency and was told that they always use UTM. However, the values have too many digits for being projected in UTM. min max x 32507319 ...
1
vote
1answer
230 views

Adding points defined by Latitude and Longitude to map using QGIS?

I have an OS map on which I want to display points defined by Latitude and Longitude, but the map coo-ordinates have values I do not recognise or understand. The image shows the map, with my first ...
0
votes
1answer
30 views

watershed delineation using ArcSWAT

I want to delineate a watershed using ArcSWAT tool. Upon uploading the DEM from disk a window pops up & says: Dataset must have a projected coordinate system. The current coordinate system is ...
1
vote
1answer
59 views

orthogonal projection of a point onto linestring in PostGIS

I am trying to find the orthogonal projection of a Point (in 4326 SRID) onto a LineString (in 4326). The picture shows the objective. I have tried to use ST_Distance function, but in this case the ...
-2
votes
0answers
16 views

Data Layers not lining up [duplicate]

My data layers are STILL NOT lining up! I have Ashtabula county parcel, jurisdiction boundary layers and parcel point layers who I obtained from the same source (ashtabula county). I added LBRS ...
1
vote
0answers
14 views

Proj4 WKT - Cartesian with origin to EPSG900913

I'm converting wgs84 to cartesian with origin using simple function in c# public static double[] LL_TO_XY(double latitude, double longitude, double originLatitude, double originLongitude) { ...
0
votes
1answer
35 views

metes and bounds from historic plans

I have an historic map from 1912 in feet and has metes and bounds displayed. I am going assume one point on the map (a lot boundary intersection) is the same as it is now and then use the metes and ...
1
vote
1answer
14 views

Error using gdalwarp in EPSG:4326

I tried to change the projection of AMSR-2 in Python using: 'gdalwarp -geoloc -t_srs EPSG:4326 C:\GW1AM2_201301311114_050A_L1SGBTBR_1110110.vrt C:\test100.tif' It said there are something wrong ...
2
votes
1answer
99 views

Identify coordinate system used near Kuala Lampur

I have some coordinates that were given to me, and I do not know much about how they were taken. I thought they were UTM coordinates, but when I try to convert them using some online tools I always ...
2
votes
2answers
470 views

Tiled raster image to be placed in an OSM/ Leaflet.js map

I have a mapoverlay in a custom projection which I need to add as a layer to an Openstreet map within a website. Since I was not able to change the projection earlier, I decided to manipulate the ...
2
votes
1answer
69 views

Coordinate transformation differences in ArcGIS, QGIS and Google Earth Pro

I have a shapefile with points in Adindan UTM 37N coordinates. Now there seem to be roughly two ways of converting those coordinates to WGS84. When loaded in Google Earth Pro the points are about ...
0
votes
1answer
29 views

Do different RDMS use different SRID's to identify the coordinate system of a spatial object?

I'm looking for a reference that lists a standard SRID for a given CRS. Do RDMS's utilize a standardized SRID, such as OGC? Or is it unique to the RDMS?
7
votes
1answer
193 views

Convert longitude/latitude to pixels on the map

I have a map from here. I want to be able to simply convert arbitrary lon/lat pair to pixels on the map (also the ability to do reverse conversion). The maps come with .tfw file and projection info, ...
0
votes
0answers
25 views

Basemap (Matlibplot) not plotting GPS WGS84 coordinates accurately

I have a list of lat,lon coordinates from Flickr pictures taken in Sydney (see here) When I plot these points on google maps, the locations are correct. However when I use my Basemap the results are ...
2
votes
1answer
36 views

Equal area world QGIS

when I use ArcGIS I normally use CRS: Cylindrical Equal Area (World) WKID: 54034 In QGIS I cannot find the same projection. When I re-project my file in ArcGIS and open it in QGIS it says I am using ...
0
votes
0answers
12 views

Convert EGM96 gps elevation to WGS84 ellipsoid elevation.

I have GPS elevation data (300k points) in EGM96. These points are located on the East US coast. I realise i need to work out the difference between the EGM96 and WGS84 ellipsoid in this region to ...
0
votes
1answer
26 views

How do i identify unknown coordinates reference system for my data [duplicate]

I have several shapesfiles which perfectly overlay but the coordinates reference system is unknown. I need to overly these with other data in a different coordinate system. I tried initially to ...
0
votes
0answers
15 views

Can I assume that ENU Coordinate are already projected?

I have an application where I need to track a vehicle position in range of max 50km. I implemented the ENU coordinate system so my future calclutaion would become easier to impelement (e.g. generating ...
1
vote
2answers
74 views

Datum shift issue between OSGB1936 and WGS84

I have to work between OSGB1936 and WGS84 and BOTH of these data sets started out life as OSBG1936 BounaryLine data. I thought I was just at the end of a full revision of my master mapping until I ...
1
vote
1answer
34 views

MySQL database layers invisible in QGIS

I'm encoutering a problem when connecting a MySQL database to QGIS. When the connection is established and a layer is imported, the layer itself will not render and thus isn't visible. The layer ...
0
votes
0answers
50 views

what is the corresponding projected coordinate system to WGS84? [duplicate]

Possible Duplicate: Global DEM to Slope calculation I want to calculate the slope from my global DEM?the DEM has WGS84 projection(degrees).In order to correctly calculate the slope from ...
3
votes
1answer
31 views

How does the offset values of LAS files relate to their coordinate system?

I have a conundrum concerning LiDAR data, the stored point offset, and the coordinate system. I process large amounts of LAS data in TerraScan (TS), which sits on top of Microstation (MS). I receive ...
0
votes
1answer
127 views

Projection Transformations [duplicate]

Possible Duplicate: How can I measure area from geographic coordinates? I created my spatial tables in WGS-84 with SRID:4326, I want to transform them to UTM Projection to measure length ...
0
votes
0answers
4 views

Shifted shapefiles with same coordinate system in ArcGIS [duplicate]

I have a strange situation with one of my GIS projects. I received from a client three shapefiles in the same coordinate system (Stereographic 1970 - a projected system). All three files should align ...
3
votes
1answer
92 views

Converting between coordinate systems for LAS file using LASPY

I am trying to convert a .las file from WGS84 to UTM17. I have some drone imagery that was used to generate a 3d point cloud/ .las file, but it is in latitude/ longitude instead of easting/ northing. ...
1
vote
1answer
33 views

Digitized GIS Data - Wrong Coordinate System, Right Location

I (correctly) georeferenced a JPEG to an existing shapefile that was in the correct coordinate system. I then proceeded to create line feature classes by manually tracing some of the features ...
-3
votes
1answer
54 views

Difference between CRS(Coordinate Reference System) and SRS(Spatial Reference System)

I could see that CRS and SRS are referred as different components in this question Is WGS84 itself a Coordinate Reference System? Could anyone please explain whether CRS and SRS are same or ...
1
vote
1answer
21 views

Importing USGS ned30m (NAD83) into Project (NAD83/Conus Albers, OTF on): coords still Lat/Long

I apologize for posting yet-another-gis-novice's confusion about CRSs, but I have researched the issue and am surprised by what I'm seeing. In simplest form, I open a new project set On-the-fly ...
1
vote
1answer
27 views

CRS problems with SwtMapPane

I'm quite new to geotools and I'm trying to get to grips with it. Trying to load some shapefiles (see attachment) into a MapContent which in turn is associated with a SwtMapPane I always get an ...
2
votes
1answer
40 views

Does ETRS89 and UTM use the same zone (longitude and latitude)?

I'm building an app for the european country Denmark exclusively and I need to retrieve some geospatial data from a (geo)server. I'm currently trying to determine whether UTM and ETRS89 uses the same ...
2
votes
2answers
40 views

QGIS CRS Coordinate Reference System — Generated vs. Specified — error levels?

Below image appears to indicate that the vector layer data was identified as NAD_1983_HARN_StatePlane_Florida_North_FIPS_0903_Feet, which is a well known (to QGIS) CRS. However when the layer was ...
4
votes
1answer
103 views

Point Coordinates Conversion with unknown system

I've been using QGis for few weeks now. Although this site always came very helpful, I can't find solution to my recent problem: I have few points, and know their coordinates in "WGS-84" and "ISN-93" ...
5
votes
1answer
52 views

Pacific-wide Projection for distance?

I have a data set of ~3500 points located across the Pacific Ocean, and am looking to measure the distance from each point to it's nearest coastline to identify the "host" country. I had originally ...
1
vote
2answers
49 views

Transformation from EPSG 31983 to EPSG 4326 change only one axis (R + ggmap)

I'm trying to convert my shape file with spTransform(), but it's not successful. I don't know why it's changing only one axis. I want to change the axis into decimal degree. # Libraries ...
0
votes
0answers
14 views

Inconsistent coordinates of centroid were found using the given value of radius of curvature in the prime vertical and in the meridian

I am currently writing a function on geodetic datum transformation in Hong Kong by referring to the Explanatory Notes on Geodetic Datums in Hong Kong by the Survey & Mapping Office of the Lands ...
5
votes
1answer
167 views

How do you check if two feature classes have the same spatial reference?

Using arcpy, how do you check if two feature classes have the same spatial reference? Just checking if the two are equal doesn't work: >>> import arcpy >>> fc1 = ...
1
vote
1answer
25 views

Grid clipping issue in Layout

I'm having an issue making a figure for a poster with ArcMap. I'm trying to make a grid that follows the map boundary in a Lambert Conical projection, and it's not coming out right. The map boundary ...
1
vote
1answer
294 views

Dynamic defining of transformation type for ISpatialReferenceFactory.CreateGeoTransformation call [duplicate]

Suppose given a point (IPoint) in some coordinate system. Required to transform it to another coordinate system. If both of coordinate systems are predefined, we can use IGeometry2.ProjectEx with ...
2
votes
0answers
30 views

Why is grid north so offset? [closed]

I am not a GIS professional, only a casual orienteering enthusiast seeking an explanation from experts. The plat of my property gives bearings and distances for each of the lines, as does the deed, ...