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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37 views

Finding adjacent grid squares in MGRS/USNG

Given an MGRS grid reference, for example 4QFJ123678 (100m precision), is there a good way to obtain the adjacent squares (north, south, east and west) from that origin square? Is it better to ...
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0answers
48 views

Generate tile package with SRID 31468

I want to show feature layers from shape files with srid 31468 using ArcGIS runtime. I want to use a custom raster base map. For that reason I successfully create a .tpk file using ArcGIS desktop. ...
2
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0answers
29 views

How do I trick QGIS's map composer into chopping off the 000's in UTM coordinates?

In QGIS 2.8 (ubuntu), you can create a map with ticks and labels. I want the first two digits to be smaller sized, the next 3 to to be normal sized, and hide the last 3 digits. QGIS does not offer ...
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1answer
28 views

WKID matching EPSG

Is there a way to matching the code of ESRI WKID with EPSG code? I'm trying to find the coordinate system of PCS Name = CGRS_1993_LTM. Which has WKID:102319 code. But I donn't know the EPSG code.
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1answer
34 views

Trouble buffering a vector layer in QGIS with PyQGIS

I am working on a script that imports a .csv layer that has lat long coordinates, which I then want to buffer in feet. I've created a vector layer from the .csv file and tried to set the coordinate ...
2
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4answers
70 views

Calculate percentage of land cover within a buffer in meters, not decimal degrees

I am trying to calculated the percentage of land cover within a buffer area (3000m) around my coordinates. My output is in decimal degrees but I want it in meters or at least that I can calculate the ...
2
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1answer
363 views

What coordinates are expressed in 6-7 digits numbers?

I am processing XML documents containing geographic information, and even though they are coming from the same source they are using different coordinates units. The first one is a regular ...
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0answers
19 views

How to Transform Many Projections Into One With SQL Server

I know very little SQL Server, but am quite familiar with Arc and Python. The data I want to transform is point data which is in a single table [ID], [X] [Y], [COORDSYS]. There are 5 possible ...
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0answers
66 views

QGIS 2.8 Raster Layers Moved [duplicate]

I recently downloaded QGIS 2.8 and opened an existing project in it to check how it handled it and make any changes required. This project includes several raster heatmap layers. My problem is that ...
3
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1answer
1k views

Add MicroStation dgn to ArcGIS/ArcCatalog 10.1

I'm an iOS programmer but new to using ArcGIS 10.1. I'm having a problem loading my MicroStation dgn file to ArcCatalog. I've connected the folder containing my MicroStation V8i roadway design dgn to ...
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2answers
35 views

How to project WMS layers from GCS_WGS_1984 to UTM ED50 31N using ArcMap?

I'm using a WMS service to open different layers. Specifically I'm using this link: http://w24.bcn.cat/WMSBaseGuia/request.aspx I have the following problem. When I open these layers with Arcmap, ...
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0answers
21 views

CRS, pixels, and floor diagram

I am trying to create a building diagram for use in a DevExpress map control. My goal is to display a raster image background in the control with a vector overlay that defines features of interest. ...
2
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1answer
185 views

WGS1984 polygon labels incorrectly located in web mercator projection?

I have polygons for states/provinces (wgs1984). When I label these polygons in ArcGIS (web mercator) some of the labels occur in random locations. For example, texas might show up in southern canada, ...
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2answers
20 views

Do I need to transform wind vectors when changing projection from EPSG4326 to EPSG24373?

I have a set of points and polygons given in "normal" lat/lon coordinates EPSG4326, which I need to transform to EPSG24373. I can do this without problem using PROJ4. However, I also have wind ...
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2answers
4k views

Converting from British National Grid (27700) to WGS84 (4326) to Web Mercator (102100)

I'm developing a web application that uses ArcGIS to display a map using JavaScript. We are holding all our data in MS SQL Server 2008 as Easting/Northing against the British National Grid. ...
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1answer
48 views

Shape file fails to import into Google Earth Pro

My shape file fails to import into Google Earth Pro. Is the map projection of my shape file to blame? When I heard Google Earth Pro was now free I thought it might be a good tool for non-GIS people ...
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2answers
6k views

How to convert from UTM Zone 36N Mercator to WGS 84 degrees of lat and long?

I have acquired many coordinates from a points I extracted from polygons. The points are in WGS 84 UTM Zone 36N, and I want to use them on Google Maps. I found out that they use different systems (I ...
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1answer
673 views

Create feature task could not be completed because 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 ArcCatalog and linked it to PostgreSQL). The feature class that I've created is registered as ...
2
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2answers
5k views

How to create custom coordinate system in ArcGIS Desktop?

I have a series of control points with xy coordinates in both NAD83 UTM and in a local grid. How can I go about creating a new projection file in ArcGIS 10 for the local grid?
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1answer
41 views

Rotation matrix in the EPSG

I use Proj4j for a WebGIS and I have to create a new ESPG. I tried on QGIS to convert coordinates from a local system (in Greece) to a world coordinates system. First, I have to do a 2D ...
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1answer
61 views

ArcGIS. Coordinates conversion from WGS84 to Stereo70 is not precise

So I want to convert coordinates from WGS84 to Stereo 70 and it is not working precise. For example, I have the coordinates (20.2600, 43.6200) and in Stereo 70 should look like (448469.26,325966.67) ...
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0answers
34 views

Projecting NAD83 on-the-fly to WGS84 [duplicate]

I have a point feature class in a geodatabase that uses WGS84 as its SRS. A colleage of mine created points in this feature class using an external database containing lat and long values. However, ...
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2answers
48 views

Transform from artificial coordinate system to a real one

I have spatial data generated in an Archaeological excavation which is in an artificial coordinate system and I want to convert it to a "real" coordinate system. To do this I took real coordinates ...
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2answers
77 views

Assigned projection and an unprojected WGS84 geographic coordinate system

I am to be submitting a shapefile for review but the first two requirements have me confused. Are these requirements conflicting or am i just not understanding the question? Requirements: The ...
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
47 views

Baidu Maps SRID?

I am making an App which will make use of Baidu maps for geofencing and other features (as the app will be released in mainland China) I am using GeoDjango, with Postgresql / PostGIS / Proj4 etc.. ...
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1answer
159 views

How to reproject from Clarke_1880_RGS_Lambert_Conformal_Conic to ETRS_1989_LAEA?

I am unable to reproject Marseille shapefiles from Clarke 1880 RGS_Lambert_Conformal_Conic to ETRS_1989_LAEA. I know that Clarke is a geographic coordinate system and it has no datum. I have tried ...
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1answer
41 views

Can layers with different extents in arcmap 10 be made to line up?

I am currently trying to get some insect sampling coordinates that are represented by points to project on top of a polygon that shows all the different plots of land in a ranch. The coordinates for ...
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2answers
1k views

Describing a coordinate system in arcpy

I have a python script in ArcGIS 10.1 which takes in a few inputs from the user. One of the inputs is a coordinate system. I would like to test whether the coordinate system the user chose was ...
3
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2answers
64 views

How to define layer's CRS and avoid the CRS dialog in PyQGIS?

There is an existing Shapefile, which I want to add. At the moment my code looks like: self.iface.addVectorLayer(self.shpFilePath, "Track", "ogr") It works fine, but i want to define the crs ...
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0answers
57 views

Line length for line files

Using QGIS, Brighton 2.6. Trying to calculate line-lengths for linear features (roads, trails, fenceline) and used this post (How to find line length in QGIS while editing?) and the links associated ...
3
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1answer
41 views

USA Contiguous Albers Equal Area Conic to miles

My data is in USA Contiguous Albers Equal Area Conic projection. How can I convert the USA Contiguous Albers Equal Area Conic projection to miles?
5
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1answer
2k views

Computing UTM Zone from lat/long point?

I am trying to convert a latlong point to UTM. To define UTM projection, I need to calculate zone for the point. I am trying to figure out the best way to do this. One way to do this would be ...
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0answers
34 views

How to check if error due to no spatial reference of extracted raster? [closed]

I have raster file without spatial reference and I extracted my area of interest by shapefile that has spatial reference. And finally, I got extracted raster with spatial reference. can i assume ...
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2answers
59 views

How can I make the UTMs of different datasets uniform?

I have wind datasets for every U.S. state and want to merge them. I found out that these datasets use different UTMs. So I want to make the UTMs uniform. How can I do that? This can not simply be done ...
131
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11answers
36k views
1
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1answer
56 views

Determining Projection using QGIS?

I am very new to QGIS and I am trying to determine the spatial projection and the units of distance of a certain raster file. The closest thing I can find is the CRS, which is set to some sort of ...
0
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1answer
889 views

Projecting from State Plane (Oregon) into UTM (zone 10)?

I have an air photo with the following xy coordinate system name: NAD_1983_StatePlane_Oregon_North_FIPS_3601_Feet_Intl and the following in the description field: Projection: ...
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1answer
32 views

Projection coordinate system [duplicate]

I have raster image that projected by WGS1984 UTM Zone 37N. But my shapefile was Adindan UTM Zone 37N. Due to this, it doesn't overlay the same. I tried to define projection for the raster image to ...
0
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1answer
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 ...
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0answers
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
882 views

Extracting lat/long from screen when using British National Grid projection in ArcGIS Desktop?

Using ArcGIS Desktop 10.0, is it possible to click anywhere on the map (projected to British National Grid), but return the coordinates in WGS84 lat long?
2
votes
1answer
1k views

Calculating distance scale factor by latitude for Mercator

This was really inconvenient topic to google out - so I'm asking for clarification, did I understood things correctly. I'm talking about measuring short distances in Mercator projection (3857). You ...
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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). ...
0
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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 ...
2
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1answer
306 views

Converting map to use space oblique mercator projection using ArcGIS for Desktop?

I have a map document in ArcMap which I want to convert to using Space oblique mercator projection, but I am not sure if ArcMap supports it. Any hints on how to achieve this?
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0answers
35 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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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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1answer
83 views

Improving accuracy of mercator meters conversion to lat/lon

My question is an extention to a previous post I had here a couple of weeks ago (converting-mercator-meters-without-utm-zone). While the answer in the previous topic got me so far, I've now come to ...